665136255 has 64 divisors (see below), whose sum is σ = 1253007360. Its totient is φ = 294973056.

The previous prime is 665136229. The next prime is 665136281. The reversal of 665136255 is 552631566.

It is an interprime number because it is at equal distance from previous prime (665136229) and next prime (665136281).

It is not a de Polignac number, because 665136255 - 2⁵ = 665136223 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 807774 + ... + 808596.

It is an arithmetic number, because the mean of its divisors is an integer number (19578240).

Almost surely, 2^665136255 is an apocalyptic number.

665136255 is a deficient number, since it is larger than the sum of its proper divisors (587871105).

665136255 is a wasteful number, since it uses less digits than its factorization.

665136255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1060.

The product of its digits is 162000, while the sum is 39.

The square root of 665136255 is about 25790.2356522774. The cubic root of 665136255 is about 872.9114836992.

The spelling of 665136255 in words is "six hundred sixty-five million, one hundred thirty-six thousand, two hundred fifty-five".