2166323240475 has 36 divisors (see below), whose sum is σ = 3880732501152. Its totient is φ = 1155191688000.

The previous prime is 2166323240423. The next prime is 2166323240491. The reversal of 2166323240475 is 5740423236612.

2166323240475 is a `hidden beast` number, since 2 + 1 + 6 + 6 + 3 + 232 + 404 + 7 + 5 = 666.

It is not a de Polignac number, because 2166323240475 - 2⁸ = 2166323240219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 2166323240475.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 694990 + ... + 2194460.

It is an arithmetic number, because the mean of its divisors is an integer number (107798125032).

Almost surely, 2^{2166323240475} is an apocalyptic number.

2166323240475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2166323240475 is a deficient number, since it is larger than the sum of its proper divisors (1714409260677).

2166323240475 is a wasteful number, since it uses less digits than its factorization.

2166323240475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1505908 (or 1505900 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 45.

The spelling of 2166323240475 in words is "two trillion, one hundred sixty-six billion, three hundred twenty-three million, two hundred forty thousand, four hundred seventy-five".