39966671 has 6 divisors (see below), whose sum is σ = 42181272. Its totient is φ = 37862820.

The previous prime is 39966637. The next prime is 39966673. The reversal of 39966671 is 17666993.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-39966671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39966673) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 54995 + ... + 55716.

It is an arithmetic number, because the mean of its divisors is an integer number (7030212).

Almost surely, 2^39966671 is an apocalyptic number.

39966671 is a deficient number, since it is larger than the sum of its proper divisors (2214601).

39966671 is a wasteful number, since it uses less digits than its factorization.

39966671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110749 (or 110730 counting only the distinct ones).

The product of its digits is 367416, while the sum is 47.

The square root of 39966671 is about 6321.9198824408. The cubic root of 39966671 is about 341.9001766276.

The spelling of 39966671 in words is "thirty-nine million, nine hundred sixty-six thousand, six hundred seventy-one".