6906660 has 48 divisors (see below), whose sum is σ = 19795776. Its totient is φ = 1798272.

The previous prime is 6906649. The next prime is 6906661. The reversal of 6906660 is 666096.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6906661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1242 + ... + 3918.

It is an arithmetic number, because the mean of its divisors is an integer number (412412).

Almost surely, 2^6906660 is an apocalyptic number.

6906660 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 6906660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9897888).

6906660 is an abundant number, since it is smaller than the sum of its proper divisors (12889116).

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

6906660 is a wasteful number, since it uses less digits than its factorization.

6906660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2732 (or 2730 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 6906660 is about 2628.0525108909. The cubic root of 6906660 is about 190.4390584960.

The spelling of 6906660 in words is "six million, nine hundred six thousand, six hundred sixty".