6977887690 has 16 divisors (see below), whose sum is σ = 12561822792. Its totient is φ = 2790793984.

The previous prime is 6977887663. The next prime is 6977887691. The reversal of 6977887690 is 967887796.

6977887690 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 5917147929 + 1060739761 = 76923^2 + 32569^2 .

It is a super-2 number, since 2×6977887690² = 97381833228507072200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6977887691) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44502 + ... + 126238.

Almost surely, 2^6977887690 is an apocalyptic number.

6977887690 is a deficient number, since it is larger than the sum of its proper divisors (5583935102).

6977887690 is a wasteful number, since it uses less digits than its factorization.

6977887690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90281.

The product of its (nonzero) digits is 64012032, while the sum is 67.

The square root of 6977887690 is about 83533.7518012929. The cubic root of 6977887690 is about 1910.9148044174.

The spelling of 6977887690 in words is "six billion, nine hundred seventy-seven million, eight hundred eighty-seven thousand, six hundred ninety".