2166072515020 has 48 divisors (see below), whose sum is σ = 4799218767840. Its totient is φ = 818931741696.

The previous prime is 2166072514999. The next prime is 2166072515021. The reversal of 2166072515020 is 205152706612.

It is not an unprimeable number, because it can be changed into a prime (2166072515021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6417667 + ... + 6746746.

It is an arithmetic number, because the mean of its divisors is an integer number (99983724330).

Almost surely, 2^{2166072515020} is an apocalyptic number.

2166072515020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2166072515020 is an abundant number, since it is smaller than the sum of its proper divisors (2633146252820).

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

2166072515020 is a wasteful number, since it uses less digits than its factorization.

2166072515020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13164874 (or 13164872 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 37.

The spelling of 2166072515020 in words is "two trillion, one hundred sixty-six billion, seventy-two million, five hundred fifteen thousand, twenty".