6645941 has 4 divisors (see below), whose sum is σ = 6787392. Its totient is φ = 6504492.

The previous prime is 6645923. The next prime is 6645943. The reversal of 6645941 is 1495466.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6645941 - 2²² = 2451637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6645943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70655 + ... + 70748.

It is an arithmetic number, because the mean of its divisors is an integer number (1696848).

Almost surely, 2^6645941 is an apocalyptic number.

It is an amenable number.

6645941 is a deficient number, since it is larger than the sum of its proper divisors (141451).

6645941 is a wasteful number, since it uses less digits than its factorization.

6645941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141450.

The product of its digits is 25920, while the sum is 35.

The square root of 6645941 is about 2577.9722651728. The cubic root of 6645941 is about 188.0119673233.

The spelling of 6645941 in words is "six million, six hundred forty-five thousand, nine hundred forty-one".