6628783 has 4 divisors (see below), whose sum is σ = 7575760. Its totient is φ = 5681808.

The previous prime is 6628781. The next prime is 6628813. The reversal of 6628783 is 3878266.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 6628783 - 2¹ = 6628781 is a prime.

It is a super-2 number, since 2×6628783² = 87881528122178, which contains 22 as substring.

It is a Duffinian number.

6628783 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6628781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 473478 + ... + 473491.

It is an arithmetic number, because the mean of its divisors is an integer number (1893940).

Almost surely, 2^6628783 is an apocalyptic number.

6628783 is a deficient number, since it is larger than the sum of its proper divisors (946977).

6628783 is an equidigital number, since it uses as much as digits as its factorization.

6628783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 946976.

The product of its digits is 96768, while the sum is 40.

The square root of 6628783 is about 2574.6423052533. The cubic root of 6628783 is about 187.8500294095.

The spelling of 6628783 in words is "six million, six hundred twenty-eight thousand, seven hundred eighty-three".