1668244025 has 12 divisors (see below), whose sum is σ = 2364140352. Its totient is φ = 1143938640.

The previous prime is 1668244009. The next prime is 1668244033. The reversal of 1668244025 is 5204428661.

It is not a de Polignac number, because 1668244025 - 2⁴ = 1668244009 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1668244025.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4766237 + ... + 4766586.

It is an arithmetic number, because the mean of its divisors is an integer number (197011696).

Almost surely, 2^1668244025 is an apocalyptic number.

It is an amenable number.

1668244025 is a deficient number, since it is larger than the sum of its proper divisors (695896327).

1668244025 is an equidigital number, since it uses as much as digits as its factorization.

1668244025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9532840 (or 9532835 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 38.

The square root of 1668244025 is about 40844.1430929821. The cubic root of 1668244025 is about 1186.0050165815.

The spelling of 1668244025 in words is "one billion, six hundred sixty-eight million, two hundred forty-four thousand, twenty-five".