6665973625 has 16 divisors (see below), whose sum is σ = 8321813136. Its totient is φ = 5331062400.

The previous prime is 6665973619. The next prime is 6665973637. The reversal of 6665973625 is 5263795666.

It can be written as a sum of positive squares in 8 ways, for example, as 2103781689 + 4562191936 = 45867^2 + 67544^2 .

It is not a de Polignac number, because 6665973625 - 2⁷ = 6665973497 is a prime.

It is a Duffinian 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 15 ways as a sum of consecutive naturals, for example, 502579 + ... + 515671.

It is an arithmetic number, because the mean of its divisors is an integer number (520113321).

Almost surely, 2^6665973625 is an apocalyptic number.

It is an amenable number.

6665973625 is a deficient number, since it is larger than the sum of its proper divisors (1655839511).

6665973625 is a wasteful number, since it uses less digits than its factorization.

6665973625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17181 (or 17171 counting only the distinct ones).

The product of its digits is 12247200, while the sum is 55.

The square root of 6665973625 is about 81645.4139863348. The cubic root of 6665973625 is about 1882.0068377842.

The spelling of 6665973625 in words is "six billion, six hundred sixty-five million, nine hundred seventy-three thousand, six hundred twenty-five".