664180222 has 4 divisors (see below), whose sum is σ = 996270336. Its totient is φ = 332090110.

The previous prime is 664180201. The next prime is 664180241. The reversal of 664180222 is 222081466.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 222081466 = 2 ⋅111040733.

It is a super-2 number, since 2×664180222² = 882270734591938568, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166045054 + ... + 166045057.

It is an arithmetic number, because the mean of its divisors is an integer number (249067584).

Almost surely, 2^664180222 is an apocalyptic number.

664180222 is a deficient number, since it is larger than the sum of its proper divisors (332090114).

664180222 is a wasteful number, since it uses less digits than its factorization.

664180222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332090113.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 664180222 is about 25771.6942011968. The cubic root of 664180222 is about 872.4930569804.

The spelling of 664180222 in words is "six hundred sixty-four million, one hundred eighty thousand, two hundred twenty-two".