2661664432 has 40 divisors (see below), whose sum is σ = 6240377376. Its totient is φ = 1073611776.

The previous prime is 2661664417. The next prime is 2661664441. The reversal of 2661664432 is 2344661662.

2661664432 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×2661664432³ (a number of 29 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 697063 + ... + 700870.

Almost surely, 2^2661664432 is an apocalyptic number.

It is an amenable number.

2661664432 is an abundant number, since it is smaller than the sum of its proper divisors (3578712944).

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

2661664432 is a wasteful number, since it uses less digits than its factorization.

2661664432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1397965 (or 1397959 counting only the distinct ones).

The product of its digits is 248832, while the sum is 40.

The square root of 2661664432 is about 51591.3212856581. The cubic root of 2661664432 is about 1385.8549170120.

The spelling of 2661664432 in words is "two billion, six hundred sixty-one million, six hundred sixty-four thousand, four hundred thirty-two".