8127391660 has 24 divisors (see below), whose sum is σ = 17218567296. Its totient is φ = 3222186240.

The previous prime is 8127391639. The next prime is 8127391661. The reversal of 8127391660 is 661937218.

It is not an unprimeable number, because it can be changed into a prime (8127391661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1795836 + ... + 1800355.

It is an arithmetic number, because the mean of its divisors is an integer number (717440304).

Almost surely, 2^8127391660 is an apocalyptic number.

It is an amenable number.

8127391660 is an abundant number, since it is smaller than the sum of its proper divisors (9091175636).

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

8127391660 is a wasteful number, since it uses less digits than its factorization.

8127391660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3596313 (or 3596311 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 8127391660 is about 90152.0474531777. The cubic root of 8127391660 is about 2010.5601155117.

The spelling of 8127391660 in words is "eight billion, one hundred twenty-seven million, three hundred ninety-one thousand, six hundred sixty".