6661392 has 40 divisors (see below), whose sum is σ = 17382816. Its totient is φ = 2198016.

The previous prime is 6661379. The next prime is 6661409. The reversal of 6661392 is 2931666.

It is a happy 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, 4488 + ... + 5784.

Almost surely, 2^6661392 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6661392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8691408).

6661392 is an abundant number, since it is smaller than the sum of its proper divisors (10721424).

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

6661392 is a wasteful number, since it uses less digits than its factorization.

6661392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1415 (or 1409 counting only the distinct ones).

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

The square root of 6661392 is about 2580.9672605440. The cubic root of 6661392 is about 188.1575561659.

The spelling of 6661392 in words is "six million, six hundred sixty-one thousand, three hundred ninety-two".