9961667212 has 48 divisors (see below), whose sum is σ = 20237962752. Its totient is φ = 4202069760.

The previous prime is 9961667201. The next prime is 9961667237. The reversal of 9961667212 is 2127661699.

It is a happy 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, 1274388 + ... + 1282180.

It is an arithmetic number, because the mean of its divisors is an integer number (421624224).

Almost surely, 2^9961667212 is an apocalyptic number.

It is an amenable number.

9961667212 is an abundant number, since it is smaller than the sum of its proper divisors (10276295540).

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

9961667212 is a wasteful number, since it uses less digits than its factorization.

9961667212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8518 (or 8516 counting only the distinct ones).

The product of its digits is 489888, while the sum is 49.

The square root of 9961667212 is about 99808.1520317855. The cubic root of 9961667212 is about 2151.6783154341.

The spelling of 9961667212 in words is "nine billion, nine hundred sixty-one million, six hundred sixty-seven thousand, two hundred twelve".