2166759855 has 64 divisors (see below), whose sum is σ = 4170472320. Its totient is φ = 1061019648.

The previous prime is 2166759851. The next prime is 2166759877. The reversal of 2166759855 is 5589576612.

It is not a de Polignac number, because 2166759855 - 2² = 2166759851 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166759851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 335517 + ... + 341913.

It is an arithmetic number, because the mean of its divisors is an integer number (65163630).

Almost surely, 2^2166759855 is an apocalyptic number.

2166759855 is a deficient number, since it is larger than the sum of its proper divisors (2003712465).

2166759855 is a wasteful number, since it uses less digits than its factorization.

2166759855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6617 (or 6611 counting only the distinct ones).

The product of its digits is 4536000, while the sum is 54.

The square root of 2166759855 is about 46548.4678050739. The cubic root of 2166759855 is about 1294.0078973373.

The spelling of 2166759855 in words is "two billion, one hundred sixty-six million, seven hundred fifty-nine thousand, eight hundred fifty-five".