7828666 has 24 divisors (see below), whose sum is σ = 12607380. Its totient is φ = 3640896.

The previous prime is 7828657. The next prime is 7828697. The reversal of 7828666 is 6668287.

It can be written as a sum of positive squares in 2 ways, for example, as 7812025 + 16641 = 2795^2 + 129^2 .

It is a super-2 number, since 2×7828666² = 122576022679112, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 107206 + ... + 107278.

Almost surely, 2^7828666 is an apocalyptic number.

7828666 is a deficient number, since it is larger than the sum of its proper divisors (4778714).

7828666 is a wasteful number, since it uses less digits than its factorization.

7828666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190 (or 147 counting only the distinct ones).

The product of its digits is 193536, while the sum is 43.

The square root of 7828666 is about 2797.9753394196. The cubic root of 7828666 is about 198.5619008050.

The spelling of 7828666 in words is "seven million, eight hundred twenty-eight thousand, six hundred sixty-six".