8661078018 has 24 divisors (see below), whose sum is σ = 18768013056. Its totient is φ = 2886665400.

The previous prime is 8661077983. The next prime is 8661078059. The reversal of 8661078018 is 8108701668.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 145903 + ... + 196493.

It is an arithmetic number, because the mean of its divisors is an integer number (782000544).

Almost surely, 2^8661078018 is an apocalyptic number.

8661078018 is an abundant number, since it is smaller than the sum of its proper divisors (10106935038).

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

8661078018 is a wasteful number, since it uses less digits than its factorization.

8661078018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60110 (or 60107 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 45.

The square root of 8661078018 is about 93064.9129264085. The cubic root of 8661078018 is about 2053.6384338606.

The spelling of 8661078018 in words is "eight billion, six hundred sixty-one million, seventy-eight thousand, eighteen".