660155202161772 has 12 divisors (see below), whose sum is σ = 1540362138377496. Its totient is φ = 220051734053920.

The previous prime is 660155202161723. The next prime is 660155202161797. The reversal of 660155202161772 is 277161202551066.

It is a tau number, because it is divible by the number of its divisors (12).

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, 27506466756729 + ... + 27506466756752.

It is an arithmetic number, because the mean of its divisors is an integer number (128363511531458).

Almost surely, 2^{660155202161772} is an apocalyptic number.

It is an amenable number.

660155202161772 is an abundant number, since it is smaller than the sum of its proper divisors (880206936215724).

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

660155202161772 is a wasteful number, since it uses less digits than its factorization.

660155202161772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55012933513488 (or 55012933513486 counting only the distinct ones).

The product of its (nonzero) digits is 2116800, while the sum is 51.

The spelling of 660155202161772 in words is "six hundred sixty trillion, one hundred fifty-five billion, two hundred two million, one hundred sixty-one thousand, seven hundred seventy-two".