656663099 has 2 divisors, whose sum is σ = 656663100. Its totient is φ = 656663098.

The previous prime is 656663071. The next prime is 656663101. The reversal of 656663099 is 990366656.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-656663099 is a prime.

Together with 656663101, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (656663069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328331549 + 328331550.

It is an arithmetic number, because the mean of its divisors is an integer number (328331550).

Almost surely, 2^656663099 is an apocalyptic number.

656663099 is a deficient number, since it is larger than the sum of its proper divisors (1).

656663099 is an equidigital number, since it uses as much as digits as its factorization.

656663099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1574640, while the sum is 50.

The square root of 656663099 is about 25625.4385133211. The cubic root of 656663099 is about 869.1889649594.

The spelling of 656663099 in words is "six hundred fifty-six million, six hundred sixty-three thousand, ninety-nine".