39966668 has 24 divisors (see below), whose sum is σ = 80237472. Its totient is φ = 17063424.

The previous prime is 39966637. The next prime is 39966673. The reversal of 39966668 is 86666993.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5180 + ... + 10332.

It is an arithmetic number, because the mean of its divisors is an integer number (3343228).

Almost surely, 2^39966668 is an apocalyptic number.

It is an amenable number.

39966668 is an abundant number, since it is smaller than the sum of its proper divisors (40270804).

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

39966668 is a wasteful number, since it uses less digits than its factorization.

39966668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5441 (or 5439 counting only the distinct ones).

The product of its digits is 2519424, while the sum is 53.

The square root of 39966668 is about 6321.9196451711. The cubic root of 39966668 is about 341.9001680730.

The spelling of 39966668 in words is "thirty-nine million, nine hundred sixty-six thousand, six hundred sixty-eight".