664547214 has 8 divisors (see below), whose sum is σ = 1329094440. Its totient is φ = 221515736.

The previous prime is 664547203. The next prime is 664547281. The reversal of 664547214 is 412745466.

It is a sphenic number, since it is the product of 3 distinct primes.

664547214 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55378929 + ... + 55378940.

It is an arithmetic number, because the mean of its divisors is an integer number (166136805).

Almost surely, 2^664547214 is an apocalyptic number.

664547214 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

664547214 is a wasteful number, since it uses less digits than its factorization.

664547214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110757874.

The product of its digits is 161280, while the sum is 39.

The square root of 664547214 is about 25778.8132775735. The cubic root of 664547214 is about 872.6537257289.

The spelling of 664547214 in words is "six hundred sixty-four million, five hundred forty-seven thousand, two hundred fourteen".