1660944384 has 150 divisors (see below), whose sum is σ = 5234491236. Its totient is φ = 503316480.

The previous prime is 1660944367. The next prime is 1660944391. The reversal of 1660944384 is 4834490661.

1660944384 is a `hidden beast` number, since 1 + 6 + 609 + 4 + 4 + 38 + 4 = 666.

It is a super-2 number, since 2×1660944384² = 5517472493482278912, which contains 22 as substring.

It is a nialpdrome in base 16.

It is a zygodrome in base 2.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 150994939 + ... + 150994949.

Almost surely, 2^1660944384 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1660944384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2617245618).

1660944384 is an abundant number, since it is smaller than the sum of its proper divisors (3573546852).

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

1660944384 is an frugal number, since it uses more digits than its factorization.

1660944384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65 (or 16 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 45.

The square root of 1660944384 is about 40754.6854238872. The cubic root of 1660944384 is about 1184.2726423508.

The spelling of 1660944384 in words is "one billion, six hundred sixty million, nine hundred forty-four thousand, three hundred eighty-four".