136664807 has 4 divisors (see below), whose sum is σ = 136725720. Its totient is φ = 136603896.

The previous prime is 136664797. The next prime is 136664813. The reversal of 136664807 is 708466631.

136664807 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 136664807 - 2⁶ = 136664743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136664837) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26957 + ... + 31622.

It is an arithmetic number, because the mean of its divisors is an integer number (34181430).

Almost surely, 2^136664807 is an apocalyptic number.

136664807 is a deficient number, since it is larger than the sum of its proper divisors (60913).

136664807 is an equidigital number, since it uses as much as digits as its factorization.

136664807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60912.

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 136664807 is about 11690.3724063864. The cubic root of 136664807 is about 515.0929005750.

The spelling of 136664807 in words is "one hundred thirty-six million, six hundred sixty-four thousand, eight hundred seven".