66164222 has 4 divisors (see below), whose sum is σ = 99246336. Its totient is φ = 33082110.

The previous prime is 66164183. The next prime is 66164239. The reversal of 66164222 is 22246166.

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, 16541054 + ... + 16541057.

It is an arithmetic number, because the mean of its divisors is an integer number (24811584).

Almost surely, 2^66164222 is an apocalyptic number.

66164222 is a deficient number, since it is larger than the sum of its proper divisors (33082114).

66164222 is a wasteful number, since it uses less digits than its factorization.

66164222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33082113.

The product of its digits is 6912, while the sum is 29.

The square root of 66164222 is about 8134.1392906687. The cubic root of 66164222 is about 404.4589065246.

The spelling of 66164222 in words is "sixty-six million, one hundred sixty-four thousand, two hundred twenty-two".