6624945 has 12 divisors (see below), whose sum is σ = 11483316. Its totient is φ = 3533280.

The previous prime is 6624941. The next prime is 6624953. The reversal of 6624945 is 5494266.

It can be written as a sum of positive squares in 2 ways, for example, as 3154176 + 3470769 = 1776^2 + 1863^2 .

It is not a de Polignac number, because 6624945 - 2² = 6624941 is a prime.

6624945 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6624941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 73566 + ... + 73655.

It is an arithmetic number, because the mean of its divisors is an integer number (956943).

Almost surely, 2^6624945 is an apocalyptic number.

It is an amenable number.

6624945 is a deficient number, since it is larger than the sum of its proper divisors (4858371).

6624945 is a wasteful number, since it uses less digits than its factorization.

6624945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147232 (or 147229 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 6624945 is about 2573.8968510801. The cubic root of 6624945 is about 187.8137679720.

It can be divided in two parts, 6624 and 945, that added together give a square (7569 = 87²).

The spelling of 6624945 in words is "six million, six hundred twenty-four thousand, nine hundred forty-five".