6744645 has 24 divisors (see below), whose sum is σ = 11860992. Its totient is φ = 3544800.

The previous prime is 6744613. The next prime is 6744653. The reversal of 6744645 is 5464476.

6744645 is a `hidden beast` number, since 6 + 7 + 4 + 4 + 645 = 666.

It is not a de Polignac number, because 6744645 - 2⁵ = 6744613 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2140 + ... + 4250.

It is an arithmetic number, because the mean of its divisors is an integer number (494208).

Almost surely, 2^6744645 is an apocalyptic number.

It is an amenable number.

6744645 is a deficient number, since it is larger than the sum of its proper divisors (5116347).

6744645 is a wasteful number, since it uses less digits than its factorization.

6744645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2193 (or 2190 counting only the distinct ones).

The product of its digits is 80640, while the sum is 36.

The square root of 6744645 is about 2597.0454366453. The cubic root of 6744645 is about 188.9381673940.

The spelling of 6744645 in words is "six million, seven hundred forty-four thousand, six hundred forty-five".