664421334 has 8 divisors (see below), whose sum is σ = 1328842680. Its totient is φ = 221473776.

The previous prime is 664421327. The next prime is 664421369. The reversal of 664421334 is 433124466.

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

664421334 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 664421295 and 664421304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55368439 + ... + 55368450.

It is an arithmetic number, because the mean of its divisors is an integer number (166105335).

Almost surely, 2^664421334 is an apocalyptic number.

664421334 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.

664421334 is a wasteful number, since it uses less digits than its factorization.

664421334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110736894.

The product of its digits is 41472, while the sum is 33.

The square root of 664421334 is about 25776.3716220883. The cubic root of 664421334 is about 872.5986222512.

It can be divided in two parts, 66442 and 1334, that added together give a palindrome (67776).

The spelling of 664421334 in words is "six hundred sixty-four million, four hundred twenty-one thousand, three hundred thirty-four".