39966325 has 24 divisors (see below), whose sum is σ = 57085632. Its totient is φ = 27189120.

The previous prime is 39966317. The next prime is 39966331. The reversal of 39966325 is 52366993.

It is not a de Polignac number, because 39966325 - 2³ = 39966317 is a prime.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23142 + ... + 24808.

It is an arithmetic number, because the mean of its divisors is an integer number (2378568).

Almost surely, 2^39966325 is an apocalyptic number.

39966325 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

39966325 is a deficient number, since it is larger than the sum of its proper divisors (17119307).

39966325 is a wasteful number, since it uses less digits than its factorization.

39966325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1821 (or 1816 counting only the distinct ones).

The product of its digits is 262440, while the sum is 43.

The square root of 39966325 is about 6321.8925172768. The cubic root of 39966325 is about 341.8991899905.

The spelling of 39966325 in words is "thirty-nine million, nine hundred sixty-six thousand, three hundred twenty-five".