31666671 has 12 divisors (see below), whose sum is σ = 45973200. Its totient is φ = 21003840.

The previous prime is 31666643. The next prime is 31666693. The reversal of 31666671 is 17666613.

It is not a de Polignac number, because 31666671 - 2¹³ = 31658479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31666601) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7050 + ... + 10631.

It is an arithmetic number, because the mean of its divisors is an integer number (3831100).

Almost surely, 2^31666671 is an apocalyptic number.

31666671 is a deficient number, since it is larger than the sum of its proper divisors (14306529).

31666671 is a wasteful number, since it uses less digits than its factorization.

31666671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17886 (or 17883 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 31666671 is about 5627.3147237381. The cubic root of 31666671 is about 316.3740130321.

The spelling of 31666671 in words is "thirty-one million, six hundred sixty-six thousand, six hundred seventy-one".