1664885952 has 84 divisors (see below), whose sum is σ = 4814514120. Its totient is φ = 550029312.

The previous prime is 1664885951. The next prime is 1664886011. The reversal of 1664885952 is 2595884661.

1664885952 is a `hidden beast` number, since 1 + 6 + 6 + 48 + 8 + 595 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (1664885951) 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, 52299 + ... + 77877.

Almost surely, 2^1664885952 is an apocalyptic number.

1664885952 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1664885952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2407257060).

1664885952 is an abundant number, since it is smaller than the sum of its proper divisors (3149628168).

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

1664885952 is a wasteful number, since it uses less digits than its factorization.

1664885952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25710 (or 25697 counting only the distinct ones).

The product of its digits is 4147200, while the sum is 54.

The square root of 1664885952 is about 40803.0140063207. The cubic root of 1664885952 is about 1185.2086968862.

The spelling of 1664885952 in words is "one billion, six hundred sixty-four million, eight hundred eighty-five thousand, nine hundred fifty-two".