2665657536 has 56 divisors (see below), whose sum is σ = 7088428800. Its totient is φ = 884074752.

The previous prime is 2665657493. The next prime is 2665657559. The reversal of 2665657536 is 6357565662.

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, 3325 + ... + 73091.

Almost surely, 2^2665657536 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 2665657536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3544214400).

2665657536 is an abundant number, since it is smaller than the sum of its proper divisors (4422771264).

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

2665657536 is a wasteful number, since it uses less digits than its factorization.

2665657536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69981 (or 69971 counting only the distinct ones).

The product of its digits is 6804000, while the sum is 51.

The square root of 2665657536 is about 51630.0061592094. The cubic root of 2665657536 is about 1386.5476036003.

The spelling of 2665657536 in words is "two billion, six hundred sixty-five million, six hundred fifty-seven thousand, five hundred thirty-six".