77705664996 has 48 divisors (see below), whose sum is σ = 188021585024. Its totient is φ = 24957144576.

The previous prime is 77705664991. The next prime is 77705665013. The reversal of 77705664996 is 69946650777.

It is not an unprimeable number, because it can be changed into a prime (77705664991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 803845 + ... + 895308.

Almost surely, 2^77705664996 is an apocalyptic number.

It is an amenable number.

77705664996 is an abundant number, since it is smaller than the sum of its proper divisors (110315920028).

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

77705664996 is a wasteful number, since it uses less digits than its factorization.

77705664996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1699300 (or 1699298 counting only the distinct ones).

The product of its (nonzero) digits is 120022560, while the sum is 66.

The spelling of 77705664996 in words is "seventy-seven billion, seven hundred five million, six hundred sixty-four thousand, nine hundred ninety-six".