6666425 has 12 divisors (see below), whose sum is σ = 8298576. Its totient is φ = 5312400.

The previous prime is 6666391. The next prime is 6666437. The reversal of 6666425 is 5246666.

It is not a de Polignac number, because 6666425 - 2¹² = 6662329 is a prime.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11390 + ... + 11960.

It is an arithmetic number, because the mean of its divisors is an integer number (691548).

Almost surely, 2^6666425 is an apocalyptic number.

It is an amenable number.

6666425 is a deficient number, since it is larger than the sum of its proper divisors (1632151).

6666425 is a wasteful number, since it uses less digits than its factorization.

6666425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1048 (or 1043 counting only the distinct ones).

The product of its digits is 51840, while the sum is 35.

The square root of 6666425 is about 2581.9420984987. The cubic root of 6666425 is about 188.2049315783.

The spelling of 6666425 in words is "six million, six hundred sixty-six thousand, four hundred twenty-five".