65977477956 has 72 divisors (see below), whose sum is σ = 181383757464. Its totient is φ = 20099750400.

The previous prime is 65977477949. The next prime is 65977477961.

It is a happy number.

65977477956 is a `hidden beast` number, since 65 + 9 + 7 + 7 + 477 + 95 + 6 = 666.

65977477956 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 4 ways, for example, as 35187757056 + 30789720900 = 187584^2 + 175470^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 650641 + ... + 745176.

Almost surely, 2^65977477956 is an apocalyptic number.

It is an amenable number.

65977477956 is an abundant number, since it is smaller than the sum of its proper divisors (115406279508).

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

65977477956 is a wasteful number, since it uses less digits than its factorization.

65977477956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1395941 (or 1395936 counting only the distinct ones).

The product of its digits is 700131600, while the sum is 72.

The spelling of 65977477956 in words is "sixty-five billion, nine hundred seventy-seven million, four hundred seventy-seven thousand, nine hundred fifty-six".