65756665756 has 12 divisors (see below), whose sum is σ = 117880852320. Its totient is φ = 32076422240.

The previous prime is 65756665721. The next prime is 65756665759.

65756665756 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65756665759) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200477476 + ... + 200477803.

It is an arithmetic number, because the mean of its divisors is an integer number (9823404360).

Almost surely, 2^65756665756 is an apocalyptic number.

It is an amenable number.

65756665756 is a deficient number, since it is larger than the sum of its proper divisors (52124186564).

65756665756 is a wasteful number, since it uses less digits than its factorization.

65756665756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400955324 (or 400955322 counting only the distinct ones).

The product of its digits is 238140000, while the sum is 64.

The spelling of 65756665756 in words is "sixty-five billion, seven hundred fifty-six million, six hundred sixty-five thousand, seven hundred fifty-six".