8066728644 has 48 divisors (see below), whose sum is σ = 20404540800. Its totient is φ = 2465625600.

The previous prime is 8066728603. The next prime is 8066728661. The reversal of 8066728644 is 4468276608.

It is a super-2 number, since 2×8066728644² (a number of 21 digits) contains 22 as substring.

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, 147669 + ... + 194780.

It is an arithmetic number, because the mean of its divisors is an integer number (425094600).

Almost surely, 2^8066728644 is an apocalyptic number.

It is an amenable number.

8066728644 is an abundant number, since it is smaller than the sum of its proper divisors (12337812156).

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

8066728644 is a wasteful number, since it uses less digits than its factorization.

8066728644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342620 (or 342618 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 51.

The square root of 8066728644 is about 89814.9689305742. The cubic root of 8066728644 is about 2005.5453307764.

The spelling of 8066728644 in words is "eight billion, sixty-six million, seven hundred twenty-eight thousand, six hundred forty-four".