6645392 has 40 divisors (see below), whose sum is σ = 14207424. Its totient is φ = 2991744.

The previous prime is 6645391. The next prime is 6645461. The reversal of 6645392 is 2935466.

It is a super-2 number, since 2×6645392² = 88322469667328, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6645391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8573 + ... + 9315.

Almost surely, 2^6645392 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 6645392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7103712).

6645392 is an abundant number, since it is smaller than the sum of its proper divisors (7562032).

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

6645392 is a wasteful number, since it uses less digits than its factorization.

6645392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 807 (or 801 counting only the distinct ones).

The product of its digits is 38880, while the sum is 35.

The square root of 6645392 is about 2577.8657839383. The cubic root of 6645392 is about 188.0067901576.

The spelling of 6645392 in words is "six million, six hundred forty-five thousand, three hundred ninety-two".