39966648 has 16 divisors (see below), whose sum is σ = 99916680. Its totient is φ = 13322208.

The previous prime is 39966637. The next prime is 39966673. The reversal of 39966648 is 84666993.

It is a self number, because there is not a number n which added to its sum of digits gives 39966648.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 832615 + ... + 832662.

Almost surely, 2^39966648 is an apocalyptic number.

It is an amenable number.

39966648 is an abundant number, since it is smaller than the sum of its proper divisors (59950032).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

39966648 is a wasteful number, since it uses less digits than its factorization.

39966648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1665286 (or 1665282 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 51.

The square root of 39966648 is about 6321.9180633729. The cubic root of 39966648 is about 341.9001110421.

The spelling of 39966648 in words is "thirty-nine million, nine hundred sixty-six thousand, six hundred forty-eight".