664465284 has 216 divisors, whose sum is σ = 2091398400. Its totient is φ = 176964480.

The previous prime is 664465271. The next prime is 664465301. The reversal of 664465284 is 482564466.

It is a super-2 number, since 2×664465284² = 883028227282401312, which contains 22 as substring.

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 71 ways as a sum of consecutive naturals, for example, 1585627 + ... + 1586045.

It is an arithmetic number, because the mean of its divisors is an integer number (9682400).

Almost surely, 2^664465284 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 664465284, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1045699200).

664465284 is an abundant number, since it is smaller than the sum of its proper divisors (1426933116).

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

664465284 is a wasteful number, since it uses less digits than its factorization.

664465284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503 (or 491 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 45.

The square root of 664465284 is about 25777.2241329434. The cubic root of 664465284 is about 872.6178619825.

The spelling of 664465284 in words is "six hundred sixty-four million, four hundred sixty-five thousand, two hundred eighty-four".