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866787668 = 22373358049
BaseRepresentation
bin110011101010100…
…010000101010100
32020102000101010222
4303222202011110
53233344201133
6222002133512
730323400515
oct6352420524
92212011128
10866787668
1140530844a
12202351298
1310a768516
1483192a0c
155116ae98
hex33aa2154

866787668 has 12 divisors (see below), whose sum is σ = 1517310900. Its totient is φ = 433270272.

The previous prime is 866787661. The next prime is 866787673.

866787668 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 556393744 + 310393924 = 23588^2 + 17618^2 .

It is a super-2 number, since 2×8667876682 = 1502641722793756448, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 866787668.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866787661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14093 + ... + 43956.

It is an arithmetic number, because the mean of its divisors is an integer number (126442575).

Almost surely, 2866787668 is an apocalyptic number.

It is an amenable number.

866787668 is a deficient number, since it is larger than the sum of its proper divisors (650523232).

866787668 is a wasteful number, since it uses less digits than its factorization.

866787668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61786 (or 61784 counting only the distinct ones).

The product of its digits is 32514048, while the sum is 62.

The square root of 866787668 is about 29441.2579214951. The cubic root of 866787668 is about 953.4638710953.

The spelling of 866787668 in words is "eight hundred sixty-six million, seven hundred eighty-seven thousand, six hundred sixty-eight".

Divisors: 1 2 4 3733 7466 14932 58049 116098 232196 216696917 433393834 866787668