664004618 has 16 divisors (see below), whose sum is σ = 1043677440. Its totient is φ = 316233456.

The previous prime is 664004599. The next prime is 664004623. The reversal of 664004618 is 816400466.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19205 + ... + 41192.

It is an arithmetic number, because the mean of its divisors is an integer number (65229840).

Almost surely, 2^664004618 is an apocalyptic number.

664004618 is a deficient number, since it is larger than the sum of its proper divisors (379672822).

664004618 is a wasteful number, since it uses less digits than its factorization.

664004618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60661.

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 664004618 is about 25768.2870598726. The cubic root of 664004618 is about 872.4161567805.

The spelling of 664004618 in words is "six hundred sixty-four million, four thousand, six hundred eighteen".