6410664 has 80 divisors (see below), whose sum is σ = 19362420. Its totient is φ = 1969920.

The previous prime is 6410647. The next prime is 6410669. The reversal of 6410664 is 4660146.

It can be written as a sum of positive squares in 2 ways, for example, as 4588164 + 1822500 = 2142^2 + 1350^2 .

It is a super-2 number, since 2×6410664² = 82193225841792, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (6410669) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 8044 + ... + 8804.

Almost surely, 2^6410664 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 6410664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9681210).

6410664 is an abundant number, since it is smaller than the sum of its proper divisors (12951756).

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

6410664 is a wasteful number, since it uses less digits than its factorization.

6410664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 792 (or 779 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 6410664 is about 2531.9289089546. The cubic root of 6410664 is about 185.7666167545.

The spelling of 6410664 in words is "six million, four hundred ten thousand, six hundred sixty-four".