1668628425 has 24 divisors (see below), whose sum is σ = 2760894720. Its totient is φ = 889259200.

The previous prime is 1668628417. The next prime is 1668628433. The reversal of 1668628425 is 5248268661.

It is an interprime number because it is at equal distance from previous prime (1668628417) and next prime (1668628433).

It is not a de Polignac number, because 1668628425 - 2³ = 1668628417 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 100195 + ... + 115655.

It is an arithmetic number, because the mean of its divisors is an integer number (115037280).

Almost surely, 2^1668628425 is an apocalyptic number.

1668628425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1668628425 is a deficient number, since it is larger than the sum of its proper divisors (1092266295).

1668628425 is a wasteful number, since it uses less digits than its factorization.

1668628425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16913 (or 16908 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 48.

The square root of 1668628425 is about 40848.8485149826. The cubic root of 1668628425 is about 1186.0961034388.

The spelling of 1668628425 in words is "one billion, six hundred sixty-eight million, six hundred twenty-eight thousand, four hundred twenty-five".