666136055 has 16 divisors (see below), whose sum is σ = 861537600. Its totient is φ = 491524608.

The previous prime is 666136027. The next prime is 666136087. The reversal of 666136055 is 550631666.

It is a cyclic number.

It is not a de Polignac number, because 666136055 - 2¹² = 666131959 is a prime.

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, 97646 + ... + 104244.

It is an arithmetic number, because the mean of its divisors is an integer number (53846100).

Almost surely, 2^666136055 is an apocalyptic number.

666136055 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

666136055 is a deficient number, since it is larger than the sum of its proper divisors (195401545).

666136055 is a wasteful number, since it uses less digits than its factorization.

666136055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8170.

The product of its (nonzero) digits is 97200, while the sum is 38.

The square root of 666136055 is about 25809.6116785976. The cubic root of 666136055 is about 873.3486372270.

The spelling of 666136055 in words is "six hundred sixty-six million, one hundred thirty-six thousand, fifty-five".