6402660 has 96 divisors (see below), whose sum is σ = 19958400. Its totient is φ = 1520640.

The previous prime is 6402653. The next prime is 6402661. The reversal of 6402660 is 662046.

It is a self number, because there is not a number n which added to its sum of digits gives 6402660.

It is not an unprimeable number, because it can be changed into a prime (6402661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 58686 + ... + 58794.

It is an arithmetic number, because the mean of its divisors is an integer number (207900).

Almost surely, 2^6402660 is an apocalyptic number.

6402660 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 6402660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9979200).

6402660 is an abundant number, since it is smaller than the sum of its proper divisors (13555740).

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

6402660 is a wasteful number, since it uses less digits than its factorization.

6402660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221 (or 219 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 6402660 is about 2530.3478021806. The cubic root of 6402660 is about 185.6892719199.

The spelling of 6402660 in words is "six million, four hundred two thousand, six hundred sixty".