7818966 has 12 divisors (see below), whose sum is σ = 16941132. Its totient is φ = 2606316.

The previous prime is 7818961. The next prime is 7818971. The reversal of 7818966 is 6698187.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (7818961) and next prime (7818971).

It is a super-2 number, since 2×7818966² = 122272458618312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7818961) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 217176 + ... + 217211.

It is an arithmetic number, because the mean of its divisors is an integer number (1411761).

Almost surely, 2^7818966 is an apocalyptic number.

7818966 is an abundant number, since it is smaller than the sum of its proper divisors (9122166).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7818966 is a wasteful number, since it uses less digits than its factorization.

7818966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434395 (or 434392 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 7818966 is about 2796.2414058876. The cubic root of 7818966 is about 198.4798584550.

It can be divided in two parts, 78 and 18966, that added together give a square (19044 = 138²).

The spelling of 7818966 in words is "seven million, eight hundred eighteen thousand, nine hundred sixty-six".