664594419 has 8 divisors (see below), whose sum is σ = 894729472. Its totient is φ = 438761160.

The previous prime is 664594397. The next prime is 664594439. The reversal of 664594419 is 914495466.

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

It is not a de Polignac number, because 664594419 - 2⁷ = 664594291 is a prime.

It is a super-2 number, since 2×664594419² = 883371483531895122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664594439) 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, 1075087 + ... + 1075704.

It is an arithmetic number, because the mean of its divisors is an integer number (111841184).

Almost surely, 2^664594419 is an apocalyptic number.

664594419 is a deficient number, since it is larger than the sum of its proper divisors (230135053).

664594419 is a wasteful number, since it uses less digits than its factorization.

664594419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2150897.

The product of its digits is 933120, while the sum is 48.

The square root of 664594419 is about 25779.7288387601. The cubic root of 664594419 is about 872.6743877390.

The spelling of 664594419 in words is "six hundred sixty-four million, five hundred ninety-four thousand, four hundred nineteen".