1664210604 has 24 divisors (see below), whose sum is σ = 4437895168. Its totient is φ = 475488720.

The previous prime is 1664210579. The next prime is 1664210659. The reversal of 1664210604 is 4060124661.

1664210604 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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, 9905932 + ... + 9906099.

Almost surely, 2^1664210604 is an apocalyptic number.

1664210604 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1664210604 is an abundant number, since it is smaller than the sum of its proper divisors (2773684564).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1664210604 is a wasteful number, since it uses less digits than its factorization.

1664210604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19812045 (or 19812043 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 1664210604 is about 40794.7374547257. The cubic root of 1664210604 is about 1185.0484183246.

The spelling of 1664210604 in words is "one billion, six hundred sixty-four million, two hundred ten thousand, six hundred four".