2656660651 has 2 divisors, whose sum is σ = 2656660652. Its totient is φ = 2656660650.

The previous prime is 2656660637. The next prime is 2656660663. The reversal of 2656660651 is 1560666562.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2656660651 - 2⁵ = 2656660619 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2656660598 and 2656660607.

It is not a weakly prime, because it can be changed into another prime (2656660621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1328330325 + 1328330326.

It is an arithmetic number, because the mean of its divisors is an integer number (1328330326).

Almost surely, 2^2656660651 is an apocalyptic number.

2656660651 is a deficient number, since it is larger than the sum of its proper divisors (1).

2656660651 is an equidigital number, since it uses as much as digits as its factorization.

2656660651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 388800, while the sum is 43.

The square root of 2656660651 is about 51542.8040661352. The cubic root of 2656660651 is about 1384.9859288626.

The spelling of 2656660651 in words is "two billion, six hundred fifty-six million, six hundred sixty thousand, six hundred fifty-one".