2665264656 has 80 divisors (see below), whose sum is σ = 7230858624. Its totient is φ = 844326912.

The previous prime is 2665264603. The next prime is 2665264663. The reversal of 2665264656 is 6564625662.

2665264656 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 165640 + ... + 181016.

Almost surely, 2^2665264656 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 2665264656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3615429312).

2665264656 is an abundant number, since it is smaller than the sum of its proper divisors (4565593968).

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

2665264656 is a wasteful number, since it uses less digits than its factorization.

2665264656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15568 (or 15562 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 48.

The square root of 2665264656 is about 51626.2012547892. The cubic root of 2665264656 is about 1386.4794811228.

The spelling of 2665264656 in words is "two billion, six hundred sixty-five million, two hundred sixty-four thousand, six hundred fifty-six".