2166620565054 has 32 divisors (see below), whose sum is σ = 4728481041024. Its totient is φ = 656369894880.

The previous prime is 2166620564893. The next prime is 2166620565071. The reversal of 2166620565054 is 4505650266612.

It is a junction number, because it is equal to n+sod(n) for n = 2166620564994 and 2166620565012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4304524 + ... + 4781439.

It is an arithmetic number, because the mean of its divisors is an integer number (147765032532).

Almost surely, 2^{2166620565054} is an apocalyptic number.

2166620565054 is an abundant number, since it is smaller than the sum of its proper divisors (2561860475970).

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

2166620565054 is a wasteful number, since it uses less digits than its factorization.

2166620565054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9089592.

The product of its (nonzero) digits is 2592000, while the sum is 48.

The spelling of 2166620565054 in words is "two trillion, one hundred sixty-six billion, six hundred twenty million, five hundred sixty-five thousand, fifty-four".