666402255 has 32 divisors (see below), whose sum is σ = 1186744320. Its totient is φ = 354805920.

The previous prime is 666402229. The next prime is 666402259. The reversal of 666402255 is 552204666.

It is not a de Polignac number, because 666402255 - 2⁷ = 666402127 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666402259) 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, 81274 + ... + 89096.

It is an arithmetic number, because the mean of its divisors is an integer number (37085760).

Almost surely, 2^666402255 is an apocalyptic number.

666402255 is a deficient number, since it is larger than the sum of its proper divisors (520342065).

666402255 is a wasteful number, since it uses less digits than its factorization.

666402255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8468 (or 8462 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The square root of 666402255 is about 25814.7681570066. The cubic root of 666402255 is about 873.4649570308.

The spelling of 666402255 in words is "six hundred sixty-six million, four hundred two thousand, two hundred fifty-five".