664914219 has 8 divisors (see below), whose sum is σ = 899039232. Its totient is φ = 437032680.

The previous prime is 664914193. The next prime is 664914223. The reversal of 664914219 is 912419466.

664914219 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 664914219 - 2¹² = 664910123 is a prime.

It is a super-2 number, since 2×664914219² = 884221837256759922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (664914119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1560619 + ... + 1561044.

It is an arithmetic number, because the mean of its divisors is an integer number (112379904).

Almost surely, 2^664914219 is an apocalyptic number.

664914219 is a deficient number, since it is larger than the sum of its proper divisors (234125013).

664914219 is a wasteful number, since it uses less digits than its factorization.

664914219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3121737.

The product of its digits is 93312, while the sum is 42.

The square root of 664914219 is about 25785.9306405644. The cubic root of 664914219 is about 872.8143410243.

The spelling of 664914219 in words is "six hundred sixty-four million, nine hundred fourteen thousand, two hundred nineteen".