2166301365255 has 24 divisors (see below), whose sum is σ = 3784488694272. Its totient is φ = 1146263396544.

The previous prime is 2166301365211. The next prime is 2166301365299. The reversal of 2166301365255 is 5525631036612.

2166301365255 is a `hidden beast` number, since 2 + 1 + 6 + 6 + 30 + 1 + 365 + 255 = 666.

It is an interprime number because it is at equal distance from previous prime (2166301365211) and next prime (2166301365299).

It is not a de Polignac number, because 2166301365255 - 2⁹ = 2166301364743 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 2166301365255.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 189521964 + ... + 189533393.

It is an arithmetic number, because the mean of its divisors is an integer number (157687028928).

Almost surely, 2^{2166301365255} is an apocalyptic number.

2166301365255 is a deficient number, since it is larger than the sum of its proper divisors (1618187329017).

2166301365255 is a wasteful number, since it uses less digits than its factorization.

2166301365255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379055495 (or 379055492 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 45.

The spelling of 2166301365255 in words is "two trillion, one hundred sixty-six billion, three hundred one million, three hundred sixty-five thousand, two hundred fifty-five".