1664934864 has 20 divisors (see below), whose sum is σ = 4301081856. Its totient is φ = 554978272.

The previous prime is 1664934853. The next prime is 1664934889. The reversal of 1664934864 is 4684394661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17343024 + ... + 17343119.

Almost surely, 2^1664934864 is an apocalyptic number.

It is an amenable number.

1664934864 is an abundant number, since it is smaller than the sum of its proper divisors (2636146992).

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

1664934864 is a wasteful number, since it uses less digits than its factorization.

1664934864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34686154 (or 34686148 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 51.

The square root of 1664934864 is about 40803.6133694064. The cubic root of 1664934864 is about 1185.2203033589.

The spelling of 1664934864 in words is "one billion, six hundred sixty-four million, nine hundred thirty-four thousand, eight hundred sixty-four".