6664977 has 16 divisors (see below), whose sum is σ = 10772160. Its totient is φ = 4039200.

The previous prime is 6664961. The next prime is 6664979. The reversal of 6664977 is 7794666.

It is not a de Polignac number, because 6664977 - 2⁴ = 6664961 is a prime.

It is a d-powerful number, because it can be written as 6⁴ + 6⁴ + 6⁵ + 4⁸ + 9³ + 7⁷ + 7⁸ .

It is not an unprimeable number, because it can be changed into a prime (6664979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10924 + ... + 11517.

It is an arithmetic number, because the mean of its divisors is an integer number (673260).

Almost surely, 2^6664977 is an apocalyptic number.

It is an amenable number.

6664977 is a deficient number, since it is larger than the sum of its proper divisors (4107183).

6664977 is a wasteful number, since it uses less digits than its factorization.

6664977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22461 (or 22455 counting only the distinct ones).

The product of its digits is 381024, while the sum is 45.

The square root of 6664977 is about 2581.6616741936. The cubic root of 6664977 is about 188.1913040606.

The spelling of 6664977 in words is "six million, six hundred sixty-four thousand, nine hundred seventy-seven".