222766665 has 16 divisors (see below), whose sum is σ = 388829376. Its totient is φ = 108008000.

The previous prime is 222766637. The next prime is 222766667. The reversal of 222766665 is 566667222.

It is a happy number.

It is not a de Polignac number, because 222766665 - 2⁶ = 222766601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (222766667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 674886 + ... + 675215.

It is an arithmetic number, because the mean of its divisors is an integer number (24301836).

Almost surely, 2^222766665 is an apocalyptic number.

It is an amenable number.

222766665 is a deficient number, since it is larger than the sum of its proper divisors (166062711).

222766665 is a wasteful number, since it uses less digits than its factorization.

222766665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1350120.

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

The square root of 222766665 is about 14925.3698446638. The cubic root of 222766665 is about 606.2011199475.

The spelling of 222766665 in words is "two hundred twenty-two million, seven hundred sixty-six thousand, six hundred sixty-five".