2166072513660 has 72 divisors (see below), whose sum is σ = 7167730869936. Its totient is φ = 525108487680.

The previous prime is 2166072513623. The next prime is 2166072513673. The reversal of 2166072513660 is 663152706612.

2166072513660 is a `hidden beast` number, since 2 + 1 + 6 + 6 + 0 + 72 + 513 + 6 + 60 = 666.

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

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, 546986029 + ... + 546989988.

It is an arithmetic number, because the mean of its divisors is an integer number (99551817638).

Almost surely, 2^{2166072513660} is an apocalyptic number.

2166072513660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2166072513660 is an abundant number, since it is smaller than the sum of its proper divisors (5001658356276).

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

2166072513660 is a wasteful number, since it uses less digits than its factorization.

2166072513660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1093976043 (or 1093976038 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 45.

The spelling of 2166072513660 in words is "two trillion, one hundred sixty-six billion, seventy-two million, five hundred thirteen thousand, six hundred sixty".