6690959577 has 12 divisors (see below), whose sum is σ = 9735266580. Its totient is φ = 4428079488.

The previous prime is 6690959551. The next prime is 6690959579. The reversal of 6690959577 is 7759590966.

6690959577 is a `hidden beast` number, since 6 + 6 + 9 + 0 + 9 + 59 + 577 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 5310911376 + 1380048201 = 72876^2 + 37149^2 .

It is not a de Polignac number, because 6690959577 - 2³² = 2395992281 is a prime.

It is a super-2 number, since 2×6690959577² = 89537880122096037858, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6690959579) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2712052 + ... + 2714517.

It is an arithmetic number, because the mean of its divisors is an integer number (811272215).

Almost surely, 2^6690959577 is an apocalyptic number.

It is an amenable number.

6690959577 is a deficient number, since it is larger than the sum of its proper divisors (3044307003).

6690959577 is a wasteful number, since it uses less digits than its factorization.

6690959577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5426712 (or 5426709 counting only the distinct ones).

The product of its (nonzero) digits is 32148900, while the sum is 63.

The square root of 6690959577 is about 81798.2859050237. The cubic root of 6690959577 is about 1884.3553370158.

The spelling of 6690959577 in words is "six billion, six hundred ninety million, nine hundred fifty-nine thousand, five hundred seventy-seven".