8180181660 has 48 divisors (see below), whose sum is σ = 26176582656. Its totient is φ = 1869755712.

The previous prime is 8180181649. The next prime is 8180181671. The reversal of 8180181660 is 661810818.

It is an interprime number because it is at equal distance from previous prime (8180181649) and next prime (8180181671).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9737892 + ... + 9738731.

It is an arithmetic number, because the mean of its divisors is an integer number (545345472).

Almost surely, 2^8180181660 is an apocalyptic number.

It is an amenable number.

8180181660 is an abundant number, since it is smaller than the sum of its proper divisors (17996400996).

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

8180181660 is a wasteful number, since it uses less digits than its factorization.

8180181660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19476642 (or 19476640 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 39.

The square root of 8180181660 is about 90444.3567062091. The cubic root of 8180181660 is about 2014.9038008205.

The spelling of 8180181660 in words is "eight billion, one hundred eighty million, one hundred eighty-one thousand, six hundred sixty".