6645867 has 8 divisors (see below), whose sum is σ = 8904000. Its totient is φ = 4409160.

The previous prime is 6645857. The next prime is 6645871. The reversal of 6645867 is 7685466.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6645867 - 2⁴ = 6645851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6645817) 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, 4617 + ... + 5882.

It is an arithmetic number, because the mean of its divisors is an integer number (1113000).

Almost surely, 2^6645867 is an apocalyptic number.

6645867 is a deficient number, since it is larger than the sum of its proper divisors (2258133).

6645867 is a wasteful number, since it uses less digits than its factorization.

6645867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10713.

The product of its digits is 241920, while the sum is 42.

The square root of 6645867 is about 2577.9579127674. The cubic root of 6645867 is about 188.0112695070.

The spelling of 6645867 in words is "six million, six hundred forty-five thousand, eight hundred sixty-seven".