664271214 has 32 divisors (see below), whose sum is σ = 1347010560. Its totient is φ = 218367072.

The previous prime is 664271213. The next prime is 664271219. The reversal of 664271214 is 412172466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664271213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129307 + ... + 134345.

It is an arithmetic number, because the mean of its divisors is an integer number (42094080).

Almost surely, 2^664271214 is an apocalyptic number.

664271214 is an abundant number, since it is smaller than the sum of its proper divisors (682739346).

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

664271214 is a wasteful number, since it uses less digits than its factorization.

664271214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5344.

The product of its digits is 16128, while the sum is 33.

The square root of 664271214 is about 25773.4594883962. The cubic root of 664271214 is about 872.5328987083.

The spelling of 664271214 in words is "six hundred sixty-four million, two hundred seventy-one thousand, two hundred fourteen".