665466464 has 48 divisors (see below), whose sum is σ = 1413472032. Its totient is φ = 306582528.

The previous prime is 665466437. The next prime is 665466493. The reversal of 665466464 is 464664566.

It is a super-2 number, since 2×665466464² = 885691229417326592, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 308012 + ... + 310164.

It is an arithmetic number, because the mean of its divisors is an integer number (29447334).

Almost surely, 2^665466464 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 665466464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (706736016).

665466464 is an abundant number, since it is smaller than the sum of its proper divisors (748005568).

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

665466464 is a wasteful number, since it uses less digits than its factorization.

665466464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2919 (or 2911 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 47.

The square root of 665466464 is about 25796.6366800015. The cubic root of 665466464 is about 873.0559130244.

The spelling of 665466464 in words is "six hundred sixty-five million, four hundred sixty-six thousand, four hundred sixty-four".