2166072515061 has 64 divisors (see below), whose sum is σ = 3628860383232. Its totient is φ = 1118753955072.

The previous prime is 2166072515053. The next prime is 2166072515099. The reversal of 2166072515061 is 1605152706612.

It is not a de Polignac number, because 2166072515061 - 2³ = 2166072515053 is a prime.

It is a congruent number.

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 63 ways as a sum of consecutive naturals, for example, 7129096 + ... + 7426718.

It is an arithmetic number, because the mean of its divisors is an integer number (56700943488).

Almost surely, 2^{2166072515061} is an apocalyptic number.

2166072515061 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2166072515061 is a deficient number, since it is larger than the sum of its proper divisors (1462787868171).

2166072515061 is a wasteful number, since it uses less digits than its factorization.

2166072515061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298202.

The product of its (nonzero) digits is 151200, while the sum is 42.

The spelling of 2166072515061 in words is "two trillion, one hundred sixty-six billion, seventy-two million, five hundred fifteen thousand, sixty-one".