31662700660 has 48 divisors (see below), whose sum is σ = 66729135312. Its totient is φ = 12619929600.

The previous prime is 31662700639. The next prime is 31662700661. The reversal of 31662700660 is 6600726613.

It can be written as a sum of positive squares in 8 ways, for example, as 22829284 + 31639871376 = 4778^2 + 177876^2 .

It is a super-2 number, since 2×31662700660² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31662700661) 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, 8840070 + ... + 8843650.

It is an arithmetic number, because the mean of its divisors is an integer number (1390190319).

Almost surely, 2^31662700660 is an apocalyptic number.

It is an amenable number.

31662700660 is an abundant number, since it is smaller than the sum of its proper divisors (35066434652).

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

31662700660 is a wasteful number, since it uses less digits than its factorization.

31662700660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5044 (or 5042 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 37.

The spelling of 31662700660 in words is "thirty-one billion, six hundred sixty-two million, seven hundred thousand, six hundred sixty".