136436661 has 6 divisors (see below), whose sum is σ = 197075190. Its totient is φ = 90957768.

The previous prime is 136436659. The next prime is 136436669. The reversal of 136436661 is 166634631.

136436661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 127916100 + 8520561 = 11310^2 + 2919^2 .

It is not a de Polignac number, because 136436661 - 2¹ = 136436659 is a prime.

It is a super-2 number, since 2×136436661² = 37229924929657842, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136436669) 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, 7579806 + ... + 7579823.

It is an arithmetic number, because the mean of its divisors is an integer number (32845865).

Almost surely, 2^136436661 is an apocalyptic number.

It is an amenable number.

136436661 is a deficient number, since it is larger than the sum of its proper divisors (60638529).

136436661 is a wasteful number, since it uses less digits than its factorization.

136436661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15159635 (or 15159632 counting only the distinct ones).

The product of its digits is 46656, while the sum is 36.

The square root of 136436661 is about 11680.6104720601. The cubic root of 136436661 is about 514.8061116996.

It can be divided in two parts, 1364 and 36661, that added together give a square (38025 = 195²).

The spelling of 136436661 in words is "one hundred thirty-six million, four hundred thirty-six thousand, six hundred sixty-one".