28666366682140 has 72 divisors (see below), whose sum is σ = 66170809061280. Its totient is φ = 10423935857280.

The previous prime is 28666366682069. The next prime is 28666366682141. The reversal of 28666366682140 is 4128666366682.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28666366682141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 205434234 + ... + 205573726.

It is an arithmetic number, because the mean of its divisors is an integer number (919039014740).

Almost surely, 2^{28666366682140} is an apocalyptic number.

28666366682140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28666366682140 is an abundant number, since it is smaller than the sum of its proper divisors (37504442379140).

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

28666366682140 is a wasteful number, since it uses less digits than its factorization.

28666366682140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224443 (or 224430 counting only the distinct ones).

The product of its (nonzero) digits is 143327232, while the sum is 64.

The spelling of 28666366682140 in words is "twenty-eight trillion, six hundred sixty-six billion, three hundred sixty-six million, six hundred eighty-two thousand, one hundred forty".