696642967656 has 24 divisors (see below), whose sum is σ = 1886741370930. Its totient is φ = 232214322528.

The previous prime is 696642967633. The next prime is 696642967667. The reversal of 696642967656 is 656769246696.

696642967656 is a `hidden beast` number, since 6 + 96 + 6 + 429 + 67 + 6 + 56 = 666.

It can be written as a sum of positive squares in only one way, i.e., 641072448900 + 55570518756 = 800670^2 + 235734^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×696642967656² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72), and also a Moran number because the ratio is a prime number: 9675596773 = 696642967656 / (6 + 9 + 6 + 6 + 4 + 2 + 9 + 6 + 7 + 6 + 5 + 6).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4837798315 + ... + 4837798458.

Almost surely, 2^696642967656 is an apocalyptic number.

It is an amenable number.

696642967656 is an abundant number, since it is smaller than the sum of its proper divisors (1190098403274).

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

696642967656 is a wasteful number, since it uses less digits than its factorization.

696642967656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9675596785 (or 9675596778 counting only the distinct ones).

The product of its digits is 1058158080, while the sum is 72.

The spelling of 696642967656 in words is "six hundred ninety-six billion, six hundred forty-two million, nine hundred sixty-seven thousand, six hundred fifty-six".