6628942 has 4 divisors (see below), whose sum is σ = 9943416. Its totient is φ = 3314470.

The previous prime is 6628879. The next prime is 6628943. The reversal of 6628942 is 2498266.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2498266 = 2 ⋅1249133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6628943) 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 as a sum of consecutive naturals, namely, 1657234 + ... + 1657237.

It is an arithmetic number, because the mean of its divisors is an integer number (2485854).

Almost surely, 2^6628942 is an apocalyptic number.

6628942 is a deficient number, since it is larger than the sum of its proper divisors (3314474).

6628942 is a wasteful number, since it uses less digits than its factorization.

6628942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3314473.

The product of its digits is 41472, while the sum is 37.

The square root of 6628942 is about 2574.6731831438. The cubic root of 6628942 is about 187.8515313401.

It can be divided in two parts, 662 and 8942, that added together give a square (9604 = 98²).

The spelling of 6628942 in words is "six million, six hundred twenty-eight thousand, nine hundred forty-two".