7776222 has 8 divisors (see below), whose sum is σ = 15552456. Its totient is φ = 2592072.

The previous prime is 7776211. The next prime is 7776239. The reversal of 7776222 is 2226777.

It is a sphenic number, since it is the product of 3 distinct primes.

7776222 is an admirable number.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 648013 + ... + 648024.

It is an arithmetic number, because the mean of its divisors is an integer number (1944057).

Almost surely, 2^7776222 is an apocalyptic number.

7776222 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

7776222 is a wasteful number, since it uses less digits than its factorization.

7776222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1296042.

The product of its digits is 16464, while the sum is 33.

The square root of 7776222 is about 2788.5878146474. The cubic root of 7776222 is about 198.1175202754.

The spelling of 7776222 in words is "seven million, seven hundred seventy-six thousand, two hundred twenty-two".