6666659051925 has 24 divisors (see below), whose sum is σ = 11026846952896. Its totient is φ = 3554055584640.

The previous prime is 6666659051917. The next prime is 6666659051939. The reversal of 6666659051925 is 5291509566666.

It is not a de Polignac number, because 6666659051925 - 2³ = 6666659051917 is a prime.

It is a super-2 number, since 2×6666659051925² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

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, 18519409 + ... + 18875958.

Almost surely, 2^{6666659051925} is an apocalyptic number.

It is an amenable number.

6666659051925 is a deficient number, since it is larger than the sum of its proper divisors (4360187900971).

6666659051925 is a wasteful number, since it uses less digits than its factorization.

6666659051925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37397757 (or 37397752 counting only the distinct ones).

The product of its (nonzero) digits is 157464000, while the sum is 66.

The spelling of 6666659051925 in words is "six trillion, six hundred sixty-six billion, six hundred fifty-nine million, fifty-one thousand, nine hundred twenty-five".