6628694 has 4 divisors (see below), whose sum is σ = 9943044. Its totient is φ = 3314346.

The previous prime is 6628679. The next prime is 6628711. The reversal of 6628694 is 4968266.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4968266 = 2 ⋅2484133.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1657172 + ... + 1657175.

It is an arithmetic number, because the mean of its divisors is an integer number (2485761).

Almost surely, 2^6628694 is an apocalyptic number.

6628694 is a deficient number, since it is larger than the sum of its proper divisors (3314350).

6628694 is a wasteful number, since it uses less digits than its factorization.

6628694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3314349.

The product of its digits is 124416, while the sum is 41.

The square root of 6628694 is about 2574.6250212410. The cubic root of 6628694 is about 187.8491886957.

The spelling of 6628694 in words is "six million, six hundred twenty-eight thousand, six hundred ninety-four".