1664920492 has 12 divisors (see below), whose sum is σ = 2917131280. Its totient is φ = 831454416.

The previous prime is 1664920471. The next prime is 1664920493. The reversal of 1664920492 is 2940294661.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1664920493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 247728 + ... + 254359.

Almost surely, 2^1664920492 is an apocalyptic number.

It is an amenable number.

1664920492 is a deficient number, since it is larger than the sum of its proper divisors (1252210788).

1664920492 is a wasteful number, since it uses less digits than its factorization.

1664920492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502920 (or 502918 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 43.

The square root of 1664920492 is about 40803.4372571723. The cubic root of 1664920492 is about 1185.2168930082.

The spelling of 1664920492 in words is "one billion, six hundred sixty-four million, nine hundred twenty thousand, four hundred ninety-two".