39959966 has 8 divisors (see below), whose sum is σ = 60197904. Its totient is φ = 19894000.

The previous prime is 39959923. The next prime is 39959971. The reversal of 39959966 is 66995993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

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, 42410 + ... + 43341.

It is an arithmetic number, because the mean of its divisors is an integer number (7524738).

Almost surely, 2^39959966 is an apocalyptic number.

39959966 is a deficient number, since it is larger than the sum of its proper divisors (20237938).

39959966 is a wasteful number, since it uses less digits than its factorization.

39959966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85986.

The product of its digits is 3542940, while the sum is 56.

The square root of 39959966 is about 6321.3895624301. The cubic root of 39959966 is about 341.8810559550.

The spelling of 39959966 in words is "thirty-nine million, nine hundred fifty-nine thousand, nine hundred sixty-six".