18316806660 has 72 divisors (see below), whose sum is σ = 55579294680. Its totient is φ = 4882871808.

The previous prime is 18316806653. The next prime is 18316806671. The reversal of 18316806660 is 6660861381.

It can be written as a sum of positive squares in 4 ways, for example, as 7651700676 + 10665105984 = 87474^2 + 103272^2 .

It is a super-4 number, since 4×18316806660⁴ (a number of 42 digits) contains 4444 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 592056 + ... + 622224.

Almost surely, 2^18316806660 is an apocalyptic number.

18316806660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18316806660 is an abundant number, since it is smaller than the sum of its proper divisors (37262488020).

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

18316806660 is a wasteful number, since it uses less digits than its factorization.

18316806660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33557 (or 33552 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The spelling of 18316806660 in words is "eighteen billion, three hundred sixteen million, eight hundred six thousand, six hundred sixty".