1664508132 has 36 divisors (see below), whose sum is σ = 4808579776. Its totient is φ = 475573680.

The previous prime is 1664508107. The next prime is 1664508133. The reversal of 1664508132 is 2318054661.

It is a happy number.

1664508132 is a `hidden beast` number, since 1 + 6 + 645 + 0 + 8 + 1 + 3 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1664508133) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3302344 + ... + 3302847.

Almost surely, 2^1664508132 is an apocalyptic number.

1664508132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1664508132 is an abundant number, since it is smaller than the sum of its proper divisors (3144071644).

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

1664508132 is a wasteful number, since it uses less digits than its factorization.

1664508132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6605208 (or 6605203 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 1664508132 is about 40798.3839385827. The cubic root of 1664508132 is about 1185.1190352036.

It can be divided in two parts, 1664 and 508132, that added together give a square (509796 = 714²).

The spelling of 1664508132 in words is "one billion, six hundred sixty-four million, five hundred eight thousand, one hundred thirty-two".