28100700661 has 8 divisors (see below), whose sum is σ = 30658958784. Its totient is φ = 25543050720.

The previous prime is 28100700643. The next prime is 28100700781. The reversal of 28100700661 is 16600700182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28100700661 - 2²⁵ = 28067146229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28100800661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52600 + ... + 242833.

It is an arithmetic number, because the mean of its divisors is an integer number (3832369848).

Almost surely, 2^28100700661 is an apocalyptic number.

It is an amenable number.

28100700661 is a deficient number, since it is larger than the sum of its proper divisors (2558258123).

28100700661 is a wasteful number, since it uses less digits than its factorization.

28100700661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304091.

The product of its (nonzero) digits is 4032, while the sum is 31.

The spelling of 28100700661 in words is "twenty-eight billion, one hundred million, seven hundred thousand, six hundred sixty-one".