136766557 has 2 divisors, whose sum is σ = 136766558. Its totient is φ = 136766556.

The previous prime is 136766549. The next prime is 136766563. The reversal of 136766557 is 755667631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119552356 + 17214201 = 10934^2 + 4149^2 .

It is an emirp because it is prime and its reverse (755667631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 136766557 - 2³ = 136766549 is a prime.

It is a super-2 number, since 2×136766557² = 37410182227268498, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136766507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68383278 + 68383279.

It is an arithmetic number, because the mean of its divisors is an integer number (68383279).

Almost surely, 2^136766557 is an apocalyptic number.

It is an amenable number.

136766557 is a deficient number, since it is larger than the sum of its proper divisors (1).

136766557 is an equidigital number, since it uses as much as digits as its factorization.

136766557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 793800, while the sum is 46.

The square root of 136766557 is about 11694.7234682997. The cubic root of 136766557 is about 515.2207015849.

The spelling of 136766557 in words is "one hundred thirty-six million, seven hundred sixty-six thousand, five hundred fifty-seven".