660110610155 has 4 divisors (see below), whose sum is σ = 792132732192. Its totient is φ = 528088488120.

The previous prime is 660110610139. The next prime is 660110610179. The reversal of 660110610155 is 551016011066.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 660110610155 - 2⁴ = 660110610139 is a prime.

It is a Duffinian 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, 66011061011 + ... + 66011061020.

It is an arithmetic number, because the mean of its divisors is an integer number (198033183048).

Almost surely, 2^660110610155 is an apocalyptic number.

660110610155 is a deficient number, since it is larger than the sum of its proper divisors (132022122037).

660110610155 is a wasteful number, since it uses less digits than its factorization.

660110610155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132022122036.

The product of its (nonzero) digits is 5400, while the sum is 32.

The spelling of 660110610155 in words is "six hundred sixty billion, one hundred ten million, six hundred ten thousand, one hundred fifty-five".