664425602 has 16 divisors (see below), whose sum is σ = 1007522880. Its totient is φ = 328592592.

The previous prime is 664425599. The next prime is 664425607. The reversal of 664425602 is 206524466.

It is a super-2 number, since 2×664425602² = 882922761186124808, which contains 22 as substring.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (664425607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 248549 + ... + 251207.

It is an arithmetic number, because the mean of its divisors is an integer number (62970180).

Almost surely, 2^664425602 is an apocalyptic number.

664425602 is a deficient number, since it is larger than the sum of its proper divisors (343097278).

664425602 is a wasteful number, since it uses less digits than its factorization.

664425602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3977.

The product of its (nonzero) digits is 69120, while the sum is 35.

The square root of 664425602 is about 25776.4544109542. The cubic root of 664425602 is about 872.6004906655.

The spelling of 664425602 in words is "six hundred sixty-four million, four hundred twenty-five thousand, six hundred two".