1664262912 has 72 divisors (see below), whose sum is σ = 4770115504. Its totient is φ = 512077824.

The previous prime is 1664262893. The next prime is 1664262917. The reversal of 1664262912 is 2192624661.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664262917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73363 + ... + 93330.

Almost surely, 2^1664262912 is an apocalyptic number.

1664262912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1664262912 is an abundant number, since it is smaller than the sum of its proper divisors (3105852592).

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

1664262912 is a wasteful number, since it uses less digits than its factorization.

1664262912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166725 (or 166711 counting only the distinct ones).

The product of its digits is 62208, while the sum is 39.

The square root of 1664262912 is about 40795.3785617930. The cubic root of 1664262912 is about 1185.0608339935.

The spelling of 1664262912 in words is "one billion, six hundred sixty-four million, two hundred sixty-two thousand, nine hundred twelve".