6645158 has 16 divisors (see below), whose sum is σ = 10777536. Its totient is φ = 3054720.

The previous prime is 6645151. The next prime is 6645161. The reversal of 6645158 is 8515466.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6645151) 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, 10910 + ... + 11502.

It is an arithmetic number, because the mean of its divisors is an integer number (673596).

Almost surely, 2^6645158 is an apocalyptic number.

6645158 is a deficient number, since it is larger than the sum of its proper divisors (4132378).

6645158 is a wasteful number, since it uses less digits than its factorization.

6645158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1039.

The product of its digits is 28800, while the sum is 35.

The square root of 6645158 is about 2577.8203971573. The cubic root of 6645158 is about 188.0045834102.

The spelling of 6645158 in words is "six million, six hundred forty-five thousand, one hundred fifty-eight".