2168166404 has 12 divisors (see below), whose sum is σ = 3896839884. Its totient is φ = 1054783584.

The previous prime is 2168166401. The next prime is 2168166467. The reversal of 2168166404 is 4046618612.

It can be written as a sum of positive squares in 2 ways, for example, as 2097640000 + 70526404 = 45800^2 + 8398^2 .

It is not an unprimeable number, because it can be changed into a prime (2168166401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7324739 + ... + 7325034.

It is an arithmetic number, because the mean of its divisors is an integer number (324736657).

Almost surely, 2^2168166404 is an apocalyptic number.

It is an amenable number.

2168166404 is a deficient number, since it is larger than the sum of its proper divisors (1728673480).

2168166404 is a wasteful number, since it uses less digits than its factorization.

2168166404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14649814 (or 14649812 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 2168166404 is about 46563.5737889608. The cubic root of 2168166404 is about 1294.2878378849.

The spelling of 2168166404 in words is "two billion, one hundred sixty-eight million, one hundred sixty-six thousand, four hundred four".