6432660 has 72 divisors (see below), whose sum is σ = 21021000. Its totient is φ = 1582848.

The previous prime is 6432649. The next prime is 6432691. The reversal of 6432660 is 662346.

It can be written as a sum of positive squares in 4 ways, for example, as 51984 + 6380676 = 228^2 + 2526^2 .

It is a super-3 number, since 3×6432660³ (a number of 21 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 966 + ... + 3714.

Almost surely, 2^6432660 is an apocalyptic number.

6432660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6432660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10510500).

6432660 is an abundant number, since it is smaller than the sum of its proper divisors (14588340).

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

6432660 is a wasteful number, since it uses less digits than its factorization.

6432660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2777 (or 2772 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 6432660 is about 2536.2689131872. The cubic root of 6432660 is about 185.9788390772.

The spelling of 6432660 in words is "six million, four hundred thirty-two thousand, six hundred sixty".