664962775 has 12 divisors (see below), whose sum is σ = 860404752. Its totient is φ = 508840640.

The previous prime is 664962761. The next prime is 664962787. The reversal of 664962775 is 577269466.

It is not a de Polignac number, because 664962775 - 2¹⁷ = 664831703 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 577654 + ... + 578803.

It is an arithmetic number, because the mean of its divisors is an integer number (71700396).

Almost surely, 2^664962775 is an apocalyptic number.

664962775 is a deficient number, since it is larger than the sum of its proper divisors (195441977).

664962775 is a wasteful number, since it uses less digits than its factorization.

664962775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1156490 (or 1156485 counting only the distinct ones).

The product of its digits is 3810240, while the sum is 52.

The square root of 664962775 is about 25786.8721445622. The cubic root of 664962775 is about 872.8355865425.

The spelling of 664962775 in words is "six hundred sixty-four million, nine hundred sixty-two thousand, seven hundred seventy-five".