660226161 has 32 divisors (see below), whose sum is σ = 1066936320. Its totient is φ = 354514176.

The previous prime is 660226139. The next prime is 660226163. The reversal of 660226161 is 161622066.

It is not a de Polignac number, because 660226161 - 2¹¹ = 660224113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (660226163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 322780 + ... + 324818.

It is an arithmetic number, because the mean of its divisors is an integer number (33341760).

Almost surely, 2^660226161 is an apocalyptic number.

It is an amenable number.

660226161 is a deficient number, since it is larger than the sum of its proper divisors (406710159).

660226161 is a wasteful number, since it uses less digits than its factorization.

660226161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2973.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 660226161 is about 25694.8664328110. The cubic root of 660226161 is about 870.7582067793.

The spelling of 660226161 in words is "six hundred sixty million, two hundred twenty-six thousand, one hundred sixty-one".