1664594064 has 100 divisors (see below), whose sum is σ = 5506107904. Its totient is φ = 475595712.

The previous prime is 1664594053. The next prime is 1664594089. The reversal of 1664594064 is 4604954661.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 82672 + ... + 100815.

Almost surely, 2^1664594064 is an apocalyptic number.

1664594064 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1664594064 is an abundant number, since it is smaller than the sum of its proper divisors (3841513840).

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

1664594064 is a wasteful number, since it uses less digits than its factorization.

1664594064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183514 (or 183499 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The square root of 1664594064 is about 40799.4370549399. The cubic root of 1664594064 is about 1185.1394291955.

The spelling of 1664594064 in words is "one billion, six hundred sixty-four million, five hundred ninety-four thousand, sixty-four".