8018378660 has 12 divisors (see below), whose sum is σ = 16838595228. Its totient is φ = 3207351456.

The previous prime is 8018378659. The next prime is 8018378671. The reversal of 8018378660 is 668738108.

It can be written as a sum of positive squares in 2 ways, for example, as 5319368356 + 2699010304 = 72934^2 + 51952^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200459447 + ... + 200459486.

It is an arithmetic number, because the mean of its divisors is an integer number (1403216269).

Almost surely, 2^8018378660 is an apocalyptic number.

It is an amenable number.

8018378660 is an abundant number, since it is smaller than the sum of its proper divisors (8820216568).

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

8018378660 is a wasteful number, since it uses less digits than its factorization.

8018378660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400918942 (or 400918940 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 47.

The square root of 8018378660 is about 89545.3999935228. The cubic root of 8018378660 is about 2001.5303836642.

The spelling of 8018378660 in words is "eight billion, eighteen million, three hundred seventy-eight thousand, six hundred sixty".