7877996688 has 20 divisors (see below), whose sum is σ = 20351491568. Its totient is φ = 2625998880.

The previous prime is 7877996671. The next prime is 7877996719. The reversal of 7877996688 is 8866997787.

It is a super-2 number, since 2×7877996688² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82062418 + ... + 82062513.

Almost surely, 2^7877996688 is an apocalyptic number.

It is an amenable number.

7877996688 is an abundant number, since it is smaller than the sum of its proper divisors (12473494880).

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

7877996688 is a wasteful number, since it uses less digits than its factorization.

7877996688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164124942 (or 164124936 counting only the distinct ones).

The product of its digits is 512096256, while the sum is 75.

The square root of 7877996688 is about 88758.0795646233. The cubic root of 7877996688 is about 1989.7809315846.

The spelling of 7877996688 in words is "seven billion, eight hundred seventy-seven million, nine hundred ninety-six thousand, six hundred eighty-eight".