6639460 has 12 divisors (see below), whose sum is σ = 13942908. Its totient is φ = 2655776.

The previous prime is 6639449. The next prime is 6639467. The reversal of 6639460 is 649366.

It can be written as a sum of positive squares in 2 ways, for example, as 3976036 + 2663424 = 1994^2 + 1632^2 .

It is not an unprimeable number, because it can be changed into a prime (6639467) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165967 + ... + 166006.

It is an arithmetic number, because the mean of its divisors is an integer number (1161909).

Almost surely, 2^6639460 is an apocalyptic number.

It is an amenable number.

6639460 is an abundant number, since it is smaller than the sum of its proper divisors (7303448).

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

6639460 is a wasteful number, since it uses less digits than its factorization.

6639460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331982 (or 331980 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 34.

The square root of 6639460 is about 2576.7149628936. The cubic root of 6639460 is about 187.9508321701.

The spelling of 6639460 in words is "six million, six hundred thirty-nine thousand, four hundred sixty".