2166140555277 has 4 divisors (see below), whose sum is σ = 2888187407040. Its totient is φ = 1444093703516.

The previous prime is 2166140555269. The next prime is 2166140555297. The reversal of 2166140555277 is 7725550416612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2166140555277 - 2³ = 2166140555269 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166140555297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 361023425877 + ... + 361023425882.

It is an arithmetic number, because the mean of its divisors is an integer number (722046851760).

Almost surely, 2^{2166140555277} is an apocalyptic number.

It is an amenable number.

2166140555277 is a deficient number, since it is larger than the sum of its proper divisors (722046851763).

2166140555277 is an equidigital number, since it uses as much as digits as its factorization.

2166140555277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722046851762.

The product of its (nonzero) digits is 3528000, while the sum is 51.

The spelling of 2166140555277 in words is "two trillion, one hundred sixty-six billion, one hundred forty million, five hundred fifty-five thousand, two hundred seventy-seven".