Search a number
-
+
66969699 = 31910191153
BaseRepresentation
bin1111111101111…
…0000001100011
311200000102011020
43333132001203
5114121012244
610351220523
71442142636
oct377360143
9150012136
1066969699
1134891365
121a517743
1310b4a454
148c73c1d
155d2cd19
hex3fde063

66969699 has 16 divisors (see below), whose sum is σ = 94166400. Its totient is φ = 42218496.

The previous prime is 66969677. The next prime is 66969713. The reversal of 66969699 is 99696966.

It is not a de Polignac number, because 66969699 - 27 = 66969571 is a prime.

66969699 is a strobogrammatic number because it is the same when read upside-down.

It is not an unprimeable number, because it can be changed into a prime (66969659) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57507 + ... + 58659.

It is an arithmetic number, because the mean of its divisors is an integer number (5885400).

Almost surely, 266969699 is an apocalyptic number.

66969699 is a deficient number, since it is larger than the sum of its proper divisors (27196701).

66969699 is a wasteful number, since it uses less digits than its factorization.

66969699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2194.

The product of its digits is 8503056, while the sum is 60.

The square root of 66969699 is about 8183.5016343861. The cubic root of 66969699 is about 406.0935724692.

The spelling of 66969699 in words is "sixty-six million, nine hundred sixty-nine thousand, six hundred ninety-nine".

Divisors: 1 3 19 57 1019 1153 3057 3459 19361 21907 58083 65721 1174907 3524721 22323233 66969699