664655156 has 12 divisors (see below), whose sum is σ = 1268887200. Its totient is φ = 302115960.

The previous prime is 664655143. The next prime is 664655179. The reversal of 664655156 is 651556466.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (44), and also a Moran number because the ratio is a prime number: 15105799 = 664655156 / (6 + 6 + 4 + 6 + 5 + 5 + 1 + 5 + 6).

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, 7552856 + ... + 7552943.

It is an arithmetic number, because the mean of its divisors is an integer number (105740600).

Almost surely, 2^664655156 is an apocalyptic number.

It is an amenable number.

664655156 is a deficient number, since it is larger than the sum of its proper divisors (604232044).

664655156 is a wasteful number, since it uses less digits than its factorization.

664655156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15105814 (or 15105812 counting only the distinct ones).

The product of its digits is 648000, while the sum is 44.

The square root of 664655156 is about 25780.9068110491. The cubic root of 664655156 is about 872.7009713757.

The spelling of 664655156 in words is "six hundred sixty-four million, six hundred fifty-five thousand, one hundred fifty-six".