666344637232755 has 32 divisors (see below), whose sum is σ = 1148487499918080. Its totient is φ = 327953895584640.

The previous prime is 666344637232741. The next prime is 666344637232759. The reversal of 666344637232755 is 557232736443666.

It is not a de Polignac number, because 666344637232755 - 2¹¹ = 666344637230707 is a prime.

It is a super-2 number, since 2×666344637232755² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 666344637232755.

It is not an unprimeable number, because it can be changed into a prime (666344637232759) 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, 482094861 + ... + 483475070.

It is an arithmetic number, because the mean of its divisors is an integer number (35890234372440).

Almost surely, 2^{666344637232755} is an apocalyptic number.

666344637232755 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

666344637232755 is a deficient number, since it is larger than the sum of its proper divisors (482142862685325).

666344637232755 is a wasteful number, since it uses less digits than its factorization.

666344637232755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 965573491.

The product of its digits is 2743372800, while the sum is 69.

The spelling of 666344637232755 in words is "six hundred sixty-six trillion, three hundred forty-four billion, six hundred thirty-seven million, two hundred thirty-two thousand, seven hundred fifty-five".