136606665 has 32 divisors (see below), whose sum is σ = 236105856. Its totient is φ = 67046400.

The previous prime is 136606651. The next prime is 136606667. The reversal of 136606665 is 566606631.

It is not a de Polignac number, because 136606665 - 2⁴ = 136606649 is a prime.

It is a super-2 number, since 2×136606665² = 37322761844844450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (136606667) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 77322 + ... + 79068.

It is an arithmetic number, because the mean of its divisors is an integer number (7378308).

Almost surely, 2^136606665 is an apocalyptic number.

136606665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

136606665 is a deficient number, since it is larger than the sum of its proper divisors (99499191).

136606665 is a wasteful number, since it uses less digits than its factorization.

136606665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2169.

The product of its (nonzero) digits is 116640, while the sum is 39.

The square root of 136606665 is about 11687.8853947153. The cubic root of 136606665 is about 515.0198440212.

The spelling of 136606665 in words is "one hundred thirty-six million, six hundred six thousand, six hundred sixty-five".