664624004 has 24 divisors (see below), whose sum is σ = 1309760256. Its totient is φ = 292356000.

The previous prime is 664624003. The next prime is 664624049. The reversal of 664624004 is 400426466.

It is not an unprimeable number, because it can be changed into a prime (664624003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 242267 + ... + 244994.

It is an arithmetic number, because the mean of its divisors is an integer number (54573344).

Almost surely, 2^664624004 is an apocalyptic number.

It is an amenable number.

664624004 is a deficient number, since it is larger than the sum of its proper divisors (645136252).

664624004 is a wasteful number, since it uses less digits than its factorization.

664624004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487307 (or 487305 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 32.

The square root of 664624004 is about 25780.3026359273. The cubic root of 664624004 is about 872.6873368339.

The spelling of 664624004 in words is "six hundred sixty-four million, six hundred twenty-four thousand, four".