28066320660 has 96 divisors (see below), whose sum is σ = 91506868992. Its totient is φ = 6294113280.

The previous prime is 28066320641. The next prime is 28066320671. The reversal of 28066320660 is 6602366082.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 608161 + ... + 652680.

It is an arithmetic number, because the mean of its divisors is an integer number (953196552).

Almost surely, 2^28066320660 is an apocalyptic number.

28066320660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28066320660 is an abundant number, since it is smaller than the sum of its proper divisors (63440548332).

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

28066320660 is a wasteful number, since it uses less digits than its factorization.

28066320660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1260913 (or 1260911 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 39.

The spelling of 28066320660 in words is "twenty-eight billion, sixty-six million, three hundred twenty thousand, six hundred sixty".