6645027 has 4 divisors (see below), whose sum is σ = 8860040. Its totient is φ = 4430016.

The previous prime is 6645019. The next prime is 6645047. The reversal of 6645027 is 7205466.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 6645027 - 2³ = 6645019 is a prime.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6644985 and 6645003.

It is not an unprimeable number, because it can be changed into a prime (6645047) 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 3 ways as a sum of consecutive naturals, for example, 1107502 + ... + 1107507.

It is an arithmetic number, because the mean of its divisors is an integer number (2215010).

Almost surely, 2^6645027 is an apocalyptic number.

6645027 is a deficient number, since it is larger than the sum of its proper divisors (2215013).

6645027 is a wasteful number, since it uses less digits than its factorization.

6645027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2215012.

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 6645027 is about 2577.7949879694. The cubic root of 6645027 is about 188.0033479863.

The spelling of 6645027 in words is "six million, six hundred forty-five thousand, twenty-seven".