660279899878 has 8 divisors (see below), whose sum is σ = 990535863240. Its totient is φ = 330101278800.

The previous prime is 660279899857. The next prime is 660279899891. The reversal of 660279899878 is 878998972066.

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

It is a junction number, because it is equal to n+sod(n) for n = 660279899798 and 660279899807.

It is a congruent number.

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, 19314223 + ... + 19348378.

It is an arithmetic number, because the mean of its divisors is an integer number (123816982905).

Almost surely, 2^660279899878 is an apocalyptic number.

660279899878 is a deficient number, since it is larger than the sum of its proper divisors (330255963362).

660279899878 is a wasteful number, since it uses less digits than its factorization.

660279899878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38671142.

The product of its (nonzero) digits is 1316818944, while the sum is 79.

The spelling of 660279899878 in words is "six hundred sixty billion, two hundred seventy-nine million, eight hundred ninety-nine thousand, eight hundred seventy-eight".