6766604991 has 12 divisors (see below), whose sum is σ = 10198941168. Its totient is φ = 4314936384.

The previous prime is 6766604983. The next prime is 6766605007. The reversal of 6766604991 is 1994066676.

It is not a de Polignac number, because 6766604991 - 2³ = 6766604983 is a prime.

It is a super-2 number, since 2×6766604991² = 91573886208452220162, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6766604951) 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, 16344250 + ... + 16344663.

It is an arithmetic number, because the mean of its divisors is an integer number (849911764).

Almost surely, 2^6766604991 is an apocalyptic number.

6766604991 is a deficient number, since it is larger than the sum of its proper divisors (3432336177).

6766604991 is a wasteful number, since it uses less digits than its factorization.

6766604991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32688942 (or 32688939 counting only the distinct ones).

The product of its (nonzero) digits is 2939328, while the sum is 54.

The square root of 6766604991 is about 82259.3763105459. The cubic root of 6766604991 is about 1891.4300078726.

The spelling of 6766604991 in words is "six billion, seven hundred sixty-six million, six hundred four thousand, nine hundred ninety-one".