1664940604 has 6 divisors (see below), whose sum is σ = 2913646064. Its totient is φ = 832470300.

The previous prime is 1664940593. The next prime is 1664940619. The reversal of 1664940604 is 4060494661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 208117572 + ... + 208117579.

Almost surely, 2^1664940604 is an apocalyptic number.

It is an amenable number.

1664940604 is a deficient number, since it is larger than the sum of its proper divisors (1248705460).

1664940604 is a wasteful number, since it uses less digits than its factorization.

1664940604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416235155 (or 416235153 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 1664940604 is about 40803.6837062538. The cubic root of 1664940604 is about 1185.2216654055.

The spelling of 1664940604 in words is "one billion, six hundred sixty-four million, nine hundred forty thousand, six hundred four".