664000634 has 8 divisors (see below), whose sum is σ = 1086546528. Its totient is φ = 301818460.

The previous prime is 664000633. The next prime is 664000643. The reversal of 664000634 is 436000466.

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

It is a junction number, because it is equal to n+sod(n) for n = 664000597 and 664000606.

It is not an unprimeable number, because it can be changed into a prime (664000633) by changing a digit.

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, 15090902 + ... + 15090945.

It is an arithmetic number, because the mean of its divisors is an integer number (135818316).

Almost surely, 2^664000634 is an apocalyptic number.

664000634 is a deficient number, since it is larger than the sum of its proper divisors (422545894).

664000634 is a wasteful number, since it uses less digits than its factorization.

664000634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30181860.

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 664000634 is about 25768.2097554331. The cubic root of 664000634 is about 872.4144119568.

The spelling of 664000634 in words is "six hundred sixty-four million, six hundred thirty-four", and thus it is an aban number.