39660625 has 40 divisors (see below), whose sum is σ = 53982720. Its totient is φ = 29040000.

The previous prime is 39660617. The next prime is 39660629. The reversal of 39660625 is 52606693.

It is not a de Polignac number, because 39660625 - 2³ = 39660617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39660629) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 445581 + ... + 445669.

It is an arithmetic number, because the mean of its divisors is an integer number (1349568).

Almost surely, 2^39660625 is an apocalyptic number.

It is an amenable number.

39660625 is a deficient number, since it is larger than the sum of its proper divisors (14322095).

39660625 is an equidigital number, since it uses as much as digits as its factorization.

39660625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163 (or 148 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 37.

The square root of 39660625 is about 6297.6682192697. The cubic root of 39660625 is about 341.0252358468.

The spelling of 39660625 in words is "thirty-nine million, six hundred sixty thousand, six hundred twenty-five".