2656566216 has 48 divisors (see below), whose sum is σ = 7217914860. Its totient is φ = 882685440.

The previous prime is 2656566197. The next prime is 2656566229. The reversal of 2656566216 is 6126656562.

It is a happy number.

2656566216 is a `hidden beast` number, since 2 + 6 + 565 + 66 + 21 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2640932100 + 15634116 = 51390^2 + 3954^2 .

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36405 + ... + 81476.

Almost surely, 2^2656566216 is an apocalyptic number.

It is an amenable number.

2656566216 is an abundant number, since it is smaller than the sum of its proper divisors (4561348644).

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

2656566216 is a wasteful number, since it uses less digits than its factorization.

2656566216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118206 (or 118199 counting only the distinct ones).

The product of its digits is 777600, while the sum is 45.

The square root of 2656566216 is about 51541.8879747337. The cubic root of 2656566216 is about 1384.9695181986.

The spelling of 2656566216 in words is "two billion, six hundred fifty-six million, five hundred sixty-six thousand, two hundred sixteen".