664860512211 has 128 divisors (see below), whose sum is σ = 1095359569920. Its totient is φ = 350710069248.

The previous prime is 664860512191. The next prime is 664860512213. The reversal of 664860512211 is 112215068466.

It is not a de Polignac number, because 664860512211 - 2⁵ = 664860512179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (664860512213) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 245606520 + ... + 245609226.

It is an arithmetic number, because the mean of its divisors is an integer number (8557496640).

Almost surely, 2^664860512211 is an apocalyptic number.

664860512211 is a deficient number, since it is larger than the sum of its proper divisors (430499057709).

664860512211 is a wasteful number, since it uses less digits than its factorization.

664860512211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2985.

The product of its (nonzero) digits is 138240, while the sum is 42.

The spelling of 664860512211 in words is "six hundred sixty-four billion, eight hundred sixty million, five hundred twelve thousand, two hundred eleven".