664377368 has 16 divisors (see below), whose sum is σ = 1285892160. Its totient is φ = 321472800.

The previous prime is 664377361. The next prime is 664377403. The reversal of 664377368 is 863773466.

It is a super-2 number, since 2×664377368² = 882794574221214848, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664377361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1339223 + ... + 1339718.

It is an arithmetic number, because the mean of its divisors is an integer number (80368260).

Almost surely, 2^664377368 is an apocalyptic number.

It is an amenable number.

664377368 is a deficient number, since it is larger than the sum of its proper divisors (621514792).

664377368 is a wasteful number, since it uses less digits than its factorization.

664377368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2678978 (or 2678974 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 50.

The square root of 664377368 is about 25775.5187726649. The cubic root of 664377368 is about 872.5793746667.

The spelling of 664377368 in words is "six hundred sixty-four million, three hundred seventy-seven thousand, three hundred sixty-eight".