664466398 has 8 divisors (see below), whose sum is σ = 1005843960. Its totient is φ = 329185080.

The previous prime is 664466359. The next prime is 664466399. The reversal of 664466398 is 893664466.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664466399) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1523788 + ... + 1524223.

It is an arithmetic number, because the mean of its divisors is an integer number (125730495).

Almost surely, 2^664466398 is an apocalyptic number.

664466398 is a deficient number, since it is larger than the sum of its proper divisors (341377562).

664466398 is a wasteful number, since it uses less digits than its factorization.

664466398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3048122.

The product of its digits is 4478976, while the sum is 52.

The square root of 664466398 is about 25777.2457411571. The cubic root of 664466398 is about 872.6183496407.

The spelling of 664466398 in words is "six hundred sixty-four million, four hundred sixty-six thousand, three hundred ninety-eight".