31313340666 has 32 divisors (see below), whose sum is σ = 69597766080. Its totient is φ = 10435895568.

The previous prime is 31313340647. The next prime is 31313340671. The reversal of 31313340666 is 66604331313.

It is a self number, because there is not a number n which added to its sum of digits gives 31313340666.

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, 267400 + ... + 366236.

It is an arithmetic number, because the mean of its divisors is an integer number (2174930190).

Almost surely, 2^31313340666 is an apocalyptic number.

31313340666 is an abundant number, since it is smaller than the sum of its proper divisors (38284425414).

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

31313340666 is a wasteful number, since it uses less digits than its factorization.

31313340666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104715 (or 104709 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 36.

Adding to 31313340666 its reverse (66604331313), we get a palindrome (97917671979).

The spelling of 31313340666 in words is "thirty-one billion, three hundred thirteen million, three hundred forty thousand, six hundred sixty-six".