6661812 has 24 divisors (see below), whose sum is σ = 16220736. Its totient is φ = 2123968.

The previous prime is 6661783. The next prime is 6661849. The reversal of 6661812 is 2181666.

It is a self number, because there is not a number n which added to its sum of digits gives 6661812.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11793 + ... + 12344.

It is an arithmetic number, because the mean of its divisors is an integer number (675864).

Almost surely, 2^6661812 is an apocalyptic number.

It is an amenable number.

6661812 is an abundant number, since it is smaller than the sum of its proper divisors (9558924).

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

6661812 is a wasteful number, since it uses less digits than its factorization.

6661812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24167 (or 24165 counting only the distinct ones).

The product of its digits is 3456, while the sum is 30.

The square root of 6661812 is about 2581.0486241061. The cubic root of 6661812 is about 188.1615105202.

The spelling of 6661812 in words is "six million, six hundred sixty-one thousand, eight hundred twelve".