2166577455 has 32 divisors (see below), whose sum is σ = 3992961024. Its totient is φ = 982630656.

The previous prime is 2166577453. The next prime is 2166577477. The reversal of 2166577455 is 5547756612.

It is not a de Polignac number, because 2166577455 - 2¹ = 2166577453 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166577453) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 67902 + ... + 94571.

It is an arithmetic number, because the mean of its divisors is an integer number (124780032).

Almost surely, 2^2166577455 is an apocalyptic number.

2166577455 is a deficient number, since it is larger than the sum of its proper divisors (1826383569).

2166577455 is a wasteful number, since it uses less digits than its factorization.

2166577455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162615.

The product of its digits is 1764000, while the sum is 48.

The square root of 2166577455 is about 46546.5085156771. The cubic root of 2166577455 is about 1293.9715860277.

The spelling of 2166577455 in words is "two billion, one hundred sixty-six million, five hundred seventy-seven thousand, four hundred fifty-five".