31668664071 has 16 divisors (see below), whose sum is σ = 47651909760. Its totient is φ = 18531297120.

The previous prime is 31668664063. The next prime is 31668664109. The reversal of 31668664071 is 17046686613.

It is not a de Polignac number, because 31668664071 - 2³ = 31668664063 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31668664071.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31668664031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16544845 + ... + 16546758.

It is an arithmetic number, because the mean of its divisors is an integer number (2978244360).

Almost surely, 2^31668664071 is an apocalyptic number.

31668664071 is a deficient number, since it is larger than the sum of its proper divisors (15983245689).

31668664071 is a wasteful number, since it uses less digits than its factorization.

31668664071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33091646.

The product of its (nonzero) digits is 870912, while the sum is 48.

The spelling of 31668664071 in words is "thirty-one billion, six hundred sixty-eight million, six hundred sixty-four thousand, seventy-one".