7656767656 has 8 divisors (see below), whose sum is σ = 14356439370. Its totient is φ = 3828383824.

The previous prime is 7656767639. The next prime is 7656767669. The reversal of 7656767656 is 6567676567.

7656767656 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It can be written as a sum of positive squares in only one way, i.e., 5965090756 + 1691676900 = 77234^2 + 41130^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 7656767594 and 7656767603.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 478547971 + ... + 478547986.

Almost surely, 2^7656767656 is an apocalyptic number.

It is an amenable number.

7656767656 is a deficient number, since it is larger than the sum of its proper divisors (6699671714).

7656767656 is a wasteful number, since it uses less digits than its factorization.

7656767656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 957095963 (or 957095959 counting only the distinct ones).

The product of its digits is 66679200, while the sum is 61.

The square root of 7656767656 is about 87502.9579842876. The cubic root of 7656767656 is about 1970.9782095065.

The spelling of 7656767656 in words is "seven billion, six hundred fifty-six million, seven hundred sixty-seven thousand, six hundred fifty-six".