6669660 has 48 divisors (see below), whose sum is σ = 18900000. Its totient is φ = 1757184.

The previous prime is 6669653. The next prime is 6669671. The reversal of 6669660 is 669666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4716 + ... + 5964.

It is an arithmetic number, because the mean of its divisors is an integer number (393750).

Almost surely, 2^6669660 is an apocalyptic number.

6669660 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 6669660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9450000).

6669660 is an abundant number, since it is smaller than the sum of its proper divisors (12230340).

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

6669660 is a wasteful number, since it uses less digits than its factorization.

6669660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1350 (or 1348 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 39.

The square root of 6669660 is about 2582.5684889273. The cubic root of 6669660 is about 188.2353699065.

The spelling of 6669660 in words is "six million, six hundred sixty-nine thousand, six hundred sixty".