6987878624 has 24 divisors (see below), whose sum is σ = 14092934688. Its totient is φ = 3408720640.

The previous prime is 6987878603. The next prime is 6987878693. The reversal of 6987878624 is 4268787896.

It is a super-2 number, since 2×6987878624² = 97660895327512266752, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2661752 + ... + 2664375.

It is an arithmetic number, because the mean of its divisors is an integer number (587205612).

Almost surely, 2^6987878624 is an apocalyptic number.

It is an amenable number.

6987878624 is an abundant number, since it is smaller than the sum of its proper divisors (7105056064).

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

6987878624 is a wasteful number, since it uses less digits than its factorization.

6987878624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5326178 (or 5326170 counting only the distinct ones).

The product of its digits is 65028096, while the sum is 65.

The square root of 6987878624 is about 83593.5321899966. The cubic root of 6987878624 is about 1911.8263849173.

The spelling of 6987878624 in words is "six billion, nine hundred eighty-seven million, eight hundred seventy-eight thousand, six hundred twenty-four".