6645064 has 16 divisors (see below), whose sum is σ = 12495420. Its totient is φ = 3312960.

The previous prime is 6645059. The next prime is 6645071. The reversal of 6645064 is 4605466.

It can be written as a sum of positive squares in 2 ways, for example, as 5062500 + 1582564 = 2250^2 + 1258^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2382 + ... + 4354.

Almost surely, 2^6645064 is an apocalyptic number.

It is an amenable number.

6645064 is a deficient number, since it is larger than the sum of its proper divisors (5850356).

6645064 is a wasteful number, since it uses less digits than its factorization.

6645064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2400 (or 2396 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 6645064 is about 2577.8021646356. The cubic root of 6645064 is about 188.0036969244.

The spelling of 6645064 in words is "six million, six hundred forty-five thousand, sixty-four".