7878066 has 16 divisors (see below), whose sum is σ = 18007104. Its totient is φ = 2250864.

The previous prime is 7878047. The next prime is 7878071. The reversal of 7878066 is 6608787.

7878066 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 187573 = 7878066 / (7 + 8 + 7 + 8 + 0 + 6 + 6).

It is a d-powerful number, because it can be written as 7² + 8³ + 7⁸ + 8⁷ + 0 + 6⁵ + 6⁵ .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93745 + ... + 93828.

It is an arithmetic number, because the mean of its divisors is an integer number (1125444).

Almost surely, 2^7878066 is an apocalyptic number.

7878066 is an abundant number, since it is smaller than the sum of its proper divisors (10129038).

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

7878066 is a wasteful number, since it uses less digits than its factorization.

7878066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187585.

The product of its (nonzero) digits is 112896, while the sum is 42.

The square root of 7878066 is about 2806.7892688978. The cubic root of 7878066 is about 198.9786767048.

The spelling of 7878066 in words is "seven million, eight hundred seventy-eight thousand, sixty-six".