31516660066 has 8 divisors (see below), whose sum is σ = 48428038764. Its totient is φ = 15373980480.

The previous prime is 31516660057. The next prime is 31516660067. The reversal of 31516660066 is 66006661513.

It can be written as a sum of positive squares in 2 ways, for example, as 25668846225 + 5847813841 = 160215^2 + 76471^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (31516660067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192174675 + ... + 192174838.

Almost surely, 2^31516660066 is an apocalyptic number.

31516660066 is a deficient number, since it is larger than the sum of its proper divisors (16911378698).

31516660066 is a wasteful number, since it uses less digits than its factorization.

31516660066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384349556.

The product of its (nonzero) digits is 116640, while the sum is 40.

The spelling of 31516660066 in words is "thirty-one billion, five hundred sixteen million, six hundred sixty thousand, sixty-six".