27506491660 has 24 divisors (see below), whose sum is σ = 60275095776. Its totient is φ = 10524222720.

The previous prime is 27506491643. The next prime is 27506491687. The reversal of 27506491660 is 6619460572.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a self number, because there is not a number n which added to its sum of digits gives 27506491660.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29897901 + ... + 29898820.

It is an arithmetic number, because the mean of its divisors is an integer number (2511462324).

Almost surely, 2^27506491660 is an apocalyptic number.

27506491660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27506491660 is an abundant number, since it is smaller than the sum of its proper divisors (32768604116).

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

27506491660 is a wasteful number, since it uses less digits than its factorization.

27506491660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59796753 (or 59796751 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 46.

The spelling of 27506491660 in words is "twenty-seven billion, five hundred six million, four hundred ninety-one thousand, six hundred sixty".