77993578662 has 16 divisors (see below), whose sum is σ = 155994422592. Its totient is φ = 25996648680.

The previous prime is 77993578643. The next prime is 77993578679. The reversal of 77993578662 is 26687539977.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157828 + ... + 425319.

It is an arithmetic number, because the mean of its divisors is an integer number (9749651412).

Almost surely, 2^77993578662 is an apocalyptic number.

77993578662 is an abundant number, since it is smaller than the sum of its proper divisors (78000843930).

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

77993578662 is a wasteful number, since it uses less digits than its factorization.

77993578662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605443.

The product of its digits is 240045120, while the sum is 69.

The spelling of 77993578662 in words is "seventy-seven billion, nine hundred ninety-three million, five hundred seventy-eight thousand, six hundred sixty-two".