668573214 has 32 divisors (see below), whose sum is σ = 1367815680. Its totient is φ = 217761792.

The previous prime is 668573207. The next prime is 668573231. The reversal of 668573214 is 412375866.

It is a Curzon 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, 215317 + ... + 218399.

It is an arithmetic number, because the mean of its divisors is an integer number (42744240).

Almost surely, 2^668573214 is an apocalyptic number.

668573214 is an abundant number, since it is smaller than the sum of its proper divisors (699242466).

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

668573214 is a wasteful number, since it uses less digits than its factorization.

668573214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3904.

The product of its digits is 241920, while the sum is 42.

The square root of 668573214 is about 25856.7827465058. The cubic root of 668573214 is about 874.4124333985.

The spelling of 668573214 in words is "six hundred sixty-eight million, five hundred seventy-three thousand, two hundred fourteen".