3661660944 has 80 divisors (see below), whose sum is σ = 10549443840. Its totient is φ = 1216010880.

The previous prime is 3661660931. The next prime is 3661661023. The reversal of 3661660944 is 4490661663.

3661660944 is a `hidden beast` number, since 36 + 6 + 1 + 6 + 609 + 4 + 4 = 666.

It is a super-2 number, since 2×3661660944² = 26815521737629942272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3661660944.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101434 + ... + 132710.

It is an arithmetic number, because the mean of its divisors is an integer number (131868048).

Almost surely, 2^3661660944 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 3661660944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5274721920).

3661660944 is an abundant number, since it is smaller than the sum of its proper divisors (6887782896).

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

3661660944 is a wasteful number, since it uses less digits than its factorization.

3661660944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31565 (or 31553 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 45.

The square root of 3661660944 is about 60511.6595706976. The cubic root of 3661660944 is about 1541.3196289901.

The spelling of 3661660944 in words is "three billion, six hundred sixty-one million, six hundred sixty thousand, nine hundred forty-four".