28873121666 has 8 divisors (see below), whose sum is σ = 43310486160. Its totient is φ = 14436292948.

The previous prime is 28873121659. The next prime is 28873121701. The reversal of 28873121666 is 66612137882.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52925 + ... + 246063.

It is an arithmetic number, because the mean of its divisors is an integer number (5413810770).

Almost surely, 2^28873121666 is an apocalyptic number.

28873121666 is a deficient number, since it is larger than the sum of its proper divisors (14437364494).

28873121666 is a wasteful number, since it uses less digits than its factorization.

28873121666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267888.

The product of its digits is 1161216, while the sum is 50.

The spelling of 28873121666 in words is "twenty-eight billion, eight hundred seventy-three million, one hundred twenty-one thousand, six hundred sixty-six".