222170575666 has 8 divisors (see below), whose sum is σ = 358890929964. Its totient is φ = 102540265680.

The previous prime is 222170575663. The next prime is 222170575673. The reversal of 222170575666 is 666575071222.

It can be written as a sum of positive squares in 2 ways, for example, as 187302856225 + 34867719441 = 432785^2 + 186729^2 .

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

It is not an unprimeable number, because it can be changed into a prime (222170575663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4272511045 + ... + 4272511096.

Almost surely, 2^222170575666 is an apocalyptic number.

222170575666 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

222170575666 is a deficient number, since it is larger than the sum of its proper divisors (136720354298).

222170575666 is a wasteful number, since it uses less digits than its factorization.

222170575666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8545022156.

The product of its (nonzero) digits is 2116800, while the sum is 49.

The spelling of 222170575666 in words is "two hundred twenty-two billion, one hundred seventy million, five hundred seventy-five thousand, six hundred sixty-six".