664627757 has 8 divisors (see below), whose sum is σ = 704895360. Its totient is φ = 625307760.

The previous prime is 664627727. The next prime is 664627759. The reversal of 664627757 is 757726466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 664627757 - 2⁸ = 664627501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664627759) 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 7 ways as a sum of consecutive naturals, for example, 235457 + ... + 238262.

It is an arithmetic number, because the mean of its divisors is an integer number (88111920).

Almost surely, 2^664627757 is an apocalyptic number.

It is an amenable number.

664627757 is a deficient number, since it is larger than the sum of its proper divisors (40267603).

664627757 is a wasteful number, since it uses less digits than its factorization.

664627757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473803.

The product of its digits is 2963520, while the sum is 50.

The square root of 664627757 is about 25780.3754239538. The cubic root of 664627757 is about 872.6889794616.

The spelling of 664627757 in words is "six hundred sixty-four million, six hundred twenty-seven thousand, seven hundred fifty-seven".