136666455 has 16 divisors (see below), whose sum is σ = 218865024. Its totient is φ = 72822560.

The previous prime is 136666447. The next prime is 136666471. The reversal of 136666455 is 554666631.

136666455 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 136666455 - 2³ = 136666447 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16120 + ... + 23090.

It is an arithmetic number, because the mean of its divisors is an integer number (13679064).

Almost surely, 2^136666455 is an apocalyptic number.

136666455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

136666455 is a deficient number, since it is larger than the sum of its proper divisors (82198569).

136666455 is a wasteful number, since it uses less digits than its factorization.

136666455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8286.

The product of its digits is 388800, while the sum is 42.

The square root of 136666455 is about 11690.4428915247. The cubic root of 136666455 is about 515.0949710171.

The spelling of 136666455 in words is "one hundred thirty-six million, six hundred sixty-six thousand, four hundred fifty-five".