656166601 has 2 divisors, whose sum is σ = 656166602. Its totient is φ = 656166600.

The previous prime is 656166587. The next prime is 656166619. The reversal of 656166601 is 106661656.

656166601 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 456933376 + 199233225 = 21376^2 + 14115^2 .

It is a cyclic number.

It is not a de Polignac number, because 656166601 - 2⁹ = 656166089 is a prime.

It is not a weakly prime, because it can be changed into another prime (656166631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328083300 + 328083301.

It is an arithmetic number, because the mean of its divisors is an integer number (328083301).

Almost surely, 2^656166601 is an apocalyptic number.

It is an amenable number.

656166601 is a deficient number, since it is larger than the sum of its proper divisors (1).

656166601 is an equidigital number, since it uses as much as digits as its factorization.

656166601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 656166601 is about 25615.7490813757. The cubic root of 656166601 is about 868.9698473261.

The spelling of 656166601 in words is "six hundred fifty-six million, one hundred sixty-six thousand, six hundred one".