664651366 has 8 divisors (see below), whose sum is σ = 997221960. Its totient is φ = 332244048.

The previous prime is 664651333. The next prime is 664651381. The reversal of 664651366 is 663156466.

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

It is a super-2 number, since 2×664651366² = 883522876651331912, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 30076 + ... + 47263.

It is an arithmetic number, because the mean of its divisors is an integer number (124652745).

Almost surely, 2^664651366 is an apocalyptic number.

664651366 is a deficient number, since it is larger than the sum of its proper divisors (332570594).

664651366 is a wasteful number, since it uses less digits than its factorization.

664651366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81638.

The product of its digits is 466560, while the sum is 43.

The square root of 664651366 is about 25780.8333069356. The cubic root of 664651366 is about 872.6993125992.

The spelling of 664651366 in words is "six hundred sixty-four million, six hundred fifty-one thousand, three hundred sixty-six".