39964666 has 32 divisors (see below), whose sum is σ = 70092288. Its totient is φ = 16737840.

The previous prime is 39964643. The next prime is 39964747. The reversal of 39964666 is 66646993.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 189301 + ... + 189511.

It is an arithmetic number, because the mean of its divisors is an integer number (2190384).

Almost surely, 2^39964666 is an apocalyptic number.

39964666 is a deficient number, since it is larger than the sum of its proper divisors (30127622).

39964666 is a wasteful number, since it uses less digits than its factorization.

39964666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466.

The product of its digits is 1259712, while the sum is 49.

The square root of 39964666 is about 6321.7613052060. The cubic root of 39964666 is about 341.8944591860.

The spelling of 39964666 in words is "thirty-nine million, nine hundred sixty-four thousand, six hundred sixty-six".