664652774 has 16 divisors (see below), whose sum is σ = 1062624096. Its totient is φ = 310704000.

The previous prime is 664652753. The next prime is 664652789. The reversal of 664652774 is 477256466.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59597 + ... + 69864.

It is an arithmetic number, because the mean of its divisors is an integer number (66414006).

Almost surely, 2^664652774 is an apocalyptic number.

664652774 is a deficient number, since it is larger than the sum of its proper divisors (397971322).

664652774 is a wasteful number, since it uses less digits than its factorization.

664652774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129631.

The product of its digits is 1693440, while the sum is 47.

The square root of 664652774 is about 25780.8606140292. The cubic root of 664652774 is about 872.6999288420.

The spelling of 664652774 in words is "six hundred sixty-four million, six hundred fifty-two thousand, seven hundred seventy-four".