6630545 has 4 divisors (see below), whose sum is σ = 7956660. Its totient is φ = 5304432.

The previous prime is 6630541. The next prime is 6630551. The reversal of 6630545 is 5450366.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3066001 + 3564544 = 1751^2 + 1888^2 .

It is a cyclic number.

It is not a de Polignac number, because 6630545 - 2² = 6630541 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6630541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 663050 + ... + 663059.

It is an arithmetic number, because the mean of its divisors is an integer number (1989165).

Almost surely, 2^6630545 is an apocalyptic number.

It is an amenable number.

6630545 is a deficient number, since it is larger than the sum of its proper divisors (1326115).

6630545 is a wasteful number, since it uses less digits than its factorization.

6630545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1326114.

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 6630545 is about 2574.9844659726. The cubic root of 6630545 is about 187.8666721039.

The spelling of 6630545 in words is "six million, six hundred thirty thousand, five hundred forty-five".