2656660650 has 48 divisors (see below), whose sum is σ = 7529738304. Its totient is φ = 607236480.

The previous prime is 2656660637. The next prime is 2656660651. The reversal of 2656660650 is 560666562.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (2656660651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1264027 + ... + 1266126.

It is an arithmetic number, because the mean of its divisors is an integer number (156869548).

Almost surely, 2^2656660650 is an apocalyptic number.

2656660650 is an abundant number, since it is smaller than the sum of its proper divisors (4873077654).

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

2656660650 is a wasteful number, since it uses less digits than its factorization.

2656660650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2530175 (or 2530170 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 42.

The square root of 2656660650 is about 51542.8040564345. The cubic root of 2656660650 is about 1384.9859286888.

The spelling of 2656660650 in words is "two billion, six hundred fifty-six million, six hundred sixty thousand, six hundred fifty".