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16666664 = 2372174161
BaseRepresentation
bin111111100101…
…000000101000
31011100202100212
4333211000220
513231313124
61353120252
7261443600
oct77450050
934322325
1016666664
119453a03
1256b9088
1335b7141
1422dbc00
1516e340e
hexfe5028

16666664 has 96 divisors (see below), whose sum is σ = 40075560. Its totient is φ = 6451200.

The previous prime is 16666631. The next prime is 16666669. The reversal of 16666664 is 46666661.

It can be written as a sum of positive squares in 4 ways, for example, as 7606564 + 9060100 = 2758^2 + 3010^2 .

It is a Harshad number since it is a multiple of its sum of digits (41).

Its product of digits (186624) is a multiple of the sum of its prime divisors (128).

It is not an unprimeable number, because it can be changed into a prime (16666669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 273194 + ... + 273254.

Almost surely, 216666664 is an apocalyptic number.

16666664 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16666664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20037780).

16666664 is an abundant number, since it is smaller than the sum of its proper divisors (23408896).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16666664 is a wasteful number, since it uses less digits than its factorization.

16666664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139 (or 128 counting only the distinct ones).

The product of its digits is 186624, while the sum is 41.

The square root of 16666664 is about 4082.4825780400. The cubic root of 16666664 is about 255.4364638412.

It can be divided in two parts, 1666 and 6664, that multiplied together give a square (11102224 = 33322).

The spelling of 16666664 in words is "sixteen million, six hundred sixty-six thousand, six hundred sixty-four".

Divisors: 1 2 4 7 8 14 17 28 34 41 49 56 61 68 82 98 119 122 136 164 196 238 244 287 328 392 427 476 488 574 697 833 854 952 1037 1148 1394 1666 1708 2009 2074 2296 2501 2788 2989 3332 3416 4018 4148 4879 5002 5576 5978 6664 7259 8036 8296 9758 10004 11956 14518 16072 17507 19516 20008 23912 29036 34153 35014 39032 42517 50813 58072 68306 70028 85034 101626 122549 136612 140056 170068 203252 245098 273224 297619 340136 406504 490196 595238 980392 1190476 2083333 2380952 4166666 8333332 16666664