664096656 has 20 divisors (see below), whose sum is σ = 1715583152. Its totient is φ = 221365536.

The previous prime is 664096651. The next prime is 664096669. The reversal of 664096656 is 656690466.

It is a happy number.

664096656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 13835347 = 664096656 / (6 + 6 + 4 + 0 + 9 + 6 + 6 + 5 + 6).

It is not an unprimeable number, because it can be changed into a prime (664096651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6917626 + ... + 6917721.

Almost surely, 2^664096656 is an apocalyptic number.

It is an amenable number.

664096656 is an abundant number, since it is smaller than the sum of its proper divisors (1051486496).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664096656 is a wasteful number, since it uses less digits than its factorization.

664096656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13835358 (or 13835352 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 48.

The square root of 664096656 is about 25770.0728753335. The cubic root of 664096656 is about 872.4564635928.

The spelling of 664096656 in words is "six hundred sixty-four million, ninety-six thousand, six hundred fifty-six".