664708275 has 288 divisors, whose sum is σ = 1624896000. Its totient is φ = 266716800.

The previous prime is 664708271. The next prime is 664708301. The reversal of 664708275 is 572807466.

It is not a de Polignac number, because 664708275 - 2² = 664708271 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 664708275.

It is not an unprimeable number, because it can be changed into a prime (664708271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 22920961 + ... + 22920989.

It is an arithmetic number, because the mean of its divisors is an integer number (5642000).

Almost surely, 2^664708275 is an apocalyptic number.

664708275 is an abundant number, since it is smaller than the sum of its proper divisors (960187725).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664708275 is a wasteful number, since it uses less digits than its factorization.

664708275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86 (or 55 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 45.

The square root of 664708275 is about 25781.9369908469. The cubic root of 664708275 is about 872.7242194052.

The spelling of 664708275 in words is "six hundred sixty-four million, seven hundred eight thousand, two hundred seventy-five".