664671751466214 has 32 divisors (see below), whose sum is σ = 1408605690973536. Its totient is φ = 208366617507840.

The previous prime is 664671751466179. The next prime is 664671751466267. The reversal of 664671751466214 is 412664157176466.

It is a Smith number, since the sum of its digits (66) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2466326167 + ... + 2466595650.

It is an arithmetic number, because the mean of its divisors is an integer number (44018927842923).

Almost surely, 2^{664671751466214} is an apocalyptic number.

664671751466214 is an abundant number, since it is smaller than the sum of its proper divisors (743933939507322).

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

664671751466214 is a wasteful number, since it uses less digits than its factorization.

664671751466214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4932923160.

The product of its digits is 243855360, while the sum is 66.

The spelling of 664671751466214 in words is "six hundred sixty-four trillion, six hundred seventy-one billion, seven hundred fifty-one million, four hundred sixty-six thousand, two hundred fourteen".