8661691308 has 12 divisors (see below), whose sum is σ = 20210613080. Its totient is φ = 2887230432.

The previous prime is 8661691249. The next prime is 8661691309. The reversal of 8661691308 is 8031961668.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (8661691309) 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, 360903793 + ... + 360903816.

Almost surely, 2^8661691308 is an apocalyptic number.

It is an amenable number.

8661691308 is an abundant number, since it is smaller than the sum of its proper divisors (11548921772).

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

8661691308 is a wasteful number, since it uses less digits than its factorization.

8661691308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721807616 (or 721807614 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 48.

The square root of 8661691308 is about 93068.2078263034. The cubic root of 8661691308 is about 2053.6869053552.

The spelling of 8661691308 in words is "eight billion, six hundred sixty-one million, six hundred ninety-one thousand, three hundred eight".