8166520512 has 168 divisors, whose sum is σ = 23838590880. Its totient is φ = 2672455680.

The previous prime is 8166520499. The next prime is 8166520513. The reversal of 8166520512 is 2150256618.

8166520512 is a `hidden beast` number, since 81 + 6 + 6 + 520 + 51 + 2 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (8166520513) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15094962 + ... + 15095502.

Almost surely, 2^8166520512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8166520512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11919295440).

8166520512 is an abundant number, since it is smaller than the sum of its proper divisors (15672070368).

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

8166520512 is a wasteful number, since it uses less digits than its factorization.

8166520512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991 (or 978 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 8166520512 is about 90368.8027584741. The cubic root of 8166520512 is about 2013.7815259766.

The spelling of 8166520512 in words is "eight billion, one hundred sixty-six million, five hundred twenty thousand, five hundred twelve".