77660631795642 has 64 divisors (see below), whose sum is σ = 178043095802880. Its totient is φ = 22122182054016.

The previous prime is 77660631795611. The next prime is 77660631795701. The reversal of 77660631795642 is 24659713606677.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27275758 + ... + 29988134.

It is an arithmetic number, because the mean of its divisors is an integer number (2781923371920).

Almost surely, 2^{77660631795642} is an apocalyptic number.

77660631795642 is an abundant number, since it is smaller than the sum of its proper divisors (100382464007238).

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

77660631795642 is a wasteful number, since it uses less digits than its factorization.

77660631795642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2714435.

The product of its (nonzero) digits is 480090240, while the sum is 69.

The spelling of 77660631795642 in words is "seventy-seven trillion, six hundred sixty billion, six hundred thirty-one million, seven hundred ninety-five thousand, six hundred forty-two".