8361661212 has 24 divisors (see below), whose sum is σ = 21678381200. Its totient is φ = 2787220368.

The previous prime is 8361661207. The next prime is 8361661213. The reversal of 8361661212 is 2121661638.

It is a happy number.

8361661212 is a `hidden beast` number, since 8 + 36 + 1 + 6 + 612 + 1 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8361661213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38711287 + ... + 38711502.

Almost surely, 2^8361661212 is an apocalyptic number.

It is an amenable number.

8361661212 is an abundant number, since it is smaller than the sum of its proper divisors (13316719988).

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

8361661212 is a wasteful number, since it uses less digits than its factorization.

8361661212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77422802 (or 77422794 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 8361661212 is about 91442.1194636257. The cubic root of 8361661212 is about 2029.6953454171.

The spelling of 8361661212 in words is "eight billion, three hundred sixty-one million, six hundred sixty-one thousand, two hundred twelve".