2165050556766 has 32 divisors (see below), whose sum is σ = 4837804826400. Its totient is φ = 717696313920.

The previous prime is 2165050556749. The next prime is 2165050556803. The reversal of 2165050556766 is 6676550505612.

2165050556766 is a `hidden beast` number, since 2 + 1 + 65 + 0 + 505 + 5 + 6 + 76 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 110745831 + ... + 110765378.

It is an arithmetic number, because the mean of its divisors is an integer number (151181400825).

Almost surely, 2^{2165050556766} is an apocalyptic number.

2165050556766 is an abundant number, since it is smaller than the sum of its proper divisors (2672754269634).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2165050556766 is a wasteful number, since it uses less digits than its factorization.

2165050556766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221511401 (or 221511395 counting only the distinct ones).

The product of its (nonzero) digits is 11340000, while the sum is 54.

The spelling of 2165050556766 in words is "two trillion, one hundred sixty-five billion, fifty million, five hundred fifty-six thousand, seven hundred sixty-six".