222765666 has 8 divisors (see below), whose sum is σ = 445531344. Its totient is φ = 74255220.

The previous prime is 222765629. The next prime is 222765667. The reversal of 222765666 is 666567222.

It is a happy number.

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

222765666 is an admirable number.

It is a super-3 number, since 3×222765666³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (222765667) 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, 18563800 + ... + 18563811.

It is an arithmetic number, because the mean of its divisors is an integer number (55691418).

Almost surely, 2^222765666 is an apocalyptic number.

222765666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

222765666 is a wasteful number, since it uses less digits than its factorization.

222765666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37127616.

The product of its digits is 362880, while the sum is 42.

The square root of 222765666 is about 14925.3363781189. The cubic root of 222765666 is about 606.2002137739.

The spelling of 222765666 in words is "two hundred twenty-two million, seven hundred sixty-five thousand, six hundred sixty-six".