6660630 has 48 divisors (see below), whose sum is σ = 17965584. Its totient is φ = 1775520.

The previous prime is 6660613. The next prime is 6660649. The reversal of 6660630 is 360666.

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

It is a junction number, because it is equal to n+sod(n) for n = 6660594 and 6660603.

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, 1060 + ... + 3800.

It is an arithmetic number, because the mean of its divisors is an integer number (374283).

Almost surely, 2^6660630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6660630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8982792).

6660630 is an abundant number, since it is smaller than the sum of its proper divisors (11304954).

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

6660630 is a wasteful number, since it uses less digits than its factorization.

6660630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2763 (or 2751 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 6660630 is about 2580.8196372471. The cubic root of 6660630 is about 188.1503814130.

The spelling of 6660630 in words is "six million, six hundred sixty thousand, six hundred thirty".