27802321660 has 24 divisors (see below), whose sum is σ = 59742665136. Its totient is φ = 10862302080.

The previous prime is 27802321649. The next prime is 27802321709. The reversal of 27802321660 is 6612320872.

It is a super-2 number, since 2×27802321660² (a number of 22 digits) contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 16163281 + ... + 16165000.

It is an arithmetic number, because the mean of its divisors is an integer number (2489277714).

Almost surely, 2^27802321660 is an apocalyptic number.

27802321660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27802321660 is an abundant number, since it is smaller than the sum of its proper divisors (31940343476).

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

27802321660 is a wasteful number, since it uses less digits than its factorization.

27802321660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32328333 (or 32328331 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 37.

The spelling of 27802321660 in words is "twenty-seven billion, eight hundred two million, three hundred twenty-one thousand, six hundred sixty".