1668236125 has 8 divisors (see below), whose sum is σ = 2081958840. Its totient is φ = 1334588800.

The previous prime is 1668236111. The next prime is 1668236177. The reversal of 1668236125 is 5216328661.

It can be written as a sum of positive squares in 4 ways, for example, as 276423876 + 1391812249 = 16626^2 + 37307^2 .

It is not a de Polignac number, because 1668236125 - 2²¹ = 1666138973 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6672820 + ... + 6673069.

It is an arithmetic number, because the mean of its divisors is an integer number (260244855).

Almost surely, 2^1668236125 is an apocalyptic number.

It is an amenable number.

1668236125 is a deficient number, since it is larger than the sum of its proper divisors (413722715).

1668236125 is an equidigital number, since it uses as much as digits as its factorization.

1668236125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13345904 (or 13345894 counting only the distinct ones).

The product of its digits is 103680, while the sum is 40.

The square root of 1668236125 is about 40844.0463837754. The cubic root of 1668236125 is about 1186.0031444624.

The spelling of 1668236125 in words is "one billion, six hundred sixty-eight million, two hundred thirty-six thousand, one hundred twenty-five".