6668957925 has 144 divisors (see below), whose sum is σ = 14208709632. Its totient is φ = 2925849600.

The previous prime is 6668957917. The next prime is 6668957929. The reversal of 6668957925 is 5297598666.

It is not a de Polignac number, because 6668957925 - 2³ = 6668957917 is a prime.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6668957929) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 6688527 + ... + 6689523.

Almost surely, 2^6668957925 is an apocalyptic number.

It is an amenable number.

6668957925 is an abundant number, since it is smaller than the sum of its proper divisors (7539751707).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6668957925 is a wasteful number, since it uses less digits than its factorization.

6668957925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1188 (or 1180 counting only the distinct ones).

The product of its digits is 48988800, while the sum is 63.

The square root of 6668957925 is about 81663.6879218665. The cubic root of 6668957925 is about 1882.2876487295.

The spelling of 6668957925 in words is "six billion, six hundred sixty-eight million, nine hundred fifty-seven thousand, nine hundred twenty-five".