136366657 has 6 divisors (see below), whose sum is σ = 158630658. Its totient is φ = 116885664.

The previous prime is 136366651. The next prime is 136366687. The reversal of 136366657 is 756663631.

It can be written as a sum of positive squares in only one way, i.e., 135512881 + 853776 = 11641^2 + 924^2 .

It is a de Polignac number, because none of the positive numbers 2^k-136366657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136366651) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1391448 + ... + 1391545.

It is an arithmetic number, because the mean of its divisors is an integer number (26438443).

Almost surely, 2^136366657 is an apocalyptic number.

It is an amenable number.

136366657 is a deficient number, since it is larger than the sum of its proper divisors (22264001).

136366657 is an equidigital number, since it uses as much as digits as its factorization.

136366657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2783007 (or 2783000 counting only the distinct ones).

The product of its digits is 408240, while the sum is 43.

The square root of 136366657 is about 11677.6134976287. The cubic root of 136366657 is about 514.7180497077.

The spelling of 136366657 in words is "one hundred thirty-six million, three hundred sixty-six thousand, six hundred fifty-seven".