31666716664 has 64 divisors (see below), whose sum is σ = 67635751680. Its totient is φ = 13758624000.

The previous prime is 31666716637. The next prime is 31666716677. The reversal of 31666716664 is 46661766613.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3478759 + ... + 3487849.

It is an arithmetic number, because the mean of its divisors is an integer number (1056808620).

Almost surely, 2^31666716664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31666716664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33817875840).

31666716664 is an abundant number, since it is smaller than the sum of its proper divisors (35969035016).

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

31666716664 is a wasteful number, since it uses less digits than its factorization.

31666716664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10852 (or 10848 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 52.

The spelling of 31666716664 in words is "thirty-one billion, six hundred sixty-six million, seven hundred sixteen thousand, six hundred sixty-four".