66055222 has 4 divisors (see below), whose sum is σ = 99082836. Its totient is φ = 33027610.

The previous prime is 66055211. The next prime is 66055259. The reversal of 66055222 is 22255066.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16513804 + ... + 16513807.

It is an arithmetic number, because the mean of its divisors is an integer number (24770709).

Almost surely, 2^66055222 is an apocalyptic number.

66055222 is a deficient number, since it is larger than the sum of its proper divisors (33027614).

66055222 is a wasteful number, since it uses less digits than its factorization.

66055222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33027613.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 66055222 is about 8127.4363731745. The cubic root of 66055222 is about 404.2366804181.

The spelling of 66055222 in words is "sixty-six million, fifty-five thousand, two hundred twenty-two".