9931666252 has 12 divisors (see below), whose sum is σ = 17381117880. Its totient is φ = 4965632576.

The previous prime is 9931666193. The next prime is 9931666253. The reversal of 9931666252 is 2526661399.

It is a happy number.

It is a super-2 number, since 2×9931666252² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 9931666196 and 9931666205.

It is not an unprimeable number, because it can be changed into a prime (9931666253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150468 + ... + 206164.

It is an arithmetic number, because the mean of its divisors is an integer number (1448426490).

Almost surely, 2^9931666252 is an apocalyptic number.

It is an amenable number.

9931666252 is a deficient number, since it is larger than the sum of its proper divisors (7449451628).

9931666252 is a wasteful number, since it uses less digits than its factorization.

9931666252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100280 (or 100278 counting only the distinct ones).

The product of its digits is 1049760, while the sum is 49.

The square root of 9931666252 is about 99657.7455695241. The cubic root of 9931666252 is about 2149.5161162349.

The spelling of 9931666252 in words is "nine billion, nine hundred thirty-one million, six hundred sixty-six thousand, two hundred fifty-two".