66222340 has 12 divisors (see below), whose sum is σ = 139066956. Its totient is φ = 26488928.

The previous prime is 66222337. The next prime is 66222397. The reversal of 66222340 is 4322266.

It is a happy number.

66222340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 31741956 + 34480384 = 5634^2 + 5872^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1655539 + ... + 1655578.

It is an arithmetic number, because the mean of its divisors is an integer number (11588913).

Almost surely, 2^66222340 is an apocalyptic number.

It is an amenable number.

66222340 is an abundant number, since it is smaller than the sum of its proper divisors (72844616).

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

66222340 is a wasteful number, since it uses less digits than its factorization.

66222340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3311126 (or 3311124 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 66222340 is about 8137.7109803679. The cubic root of 66222340 is about 404.5772961054.

The spelling of 66222340 in words is "sixty-six million, two hundred twenty-two thousand, three hundred forty".