2166057567727 has 4 divisors (see below), whose sum is σ = 2166101663056. Its totient is φ = 2166013472400.

The previous prime is 2166057567721. The next prime is 2166057567749. The reversal of 2166057567727 is 7277657506612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2166057567727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166057567721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21973899 + ... + 22072252.

It is an arithmetic number, because the mean of its divisors is an integer number (541525415764).

Almost surely, 2^{2166057567727} is an apocalyptic number.

2166057567727 is a deficient number, since it is larger than the sum of its proper divisors (44095329).

2166057567727 is an equidigital number, since it uses as much as digits as its factorization.

2166057567727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44095328.

The product of its (nonzero) digits is 51861600, while the sum is 61.

The spelling of 2166057567727 in words is "two trillion, one hundred sixty-six billion, fifty-seven million, five hundred sixty-seven thousand, seven hundred twenty-seven".