223166665 has 16 divisors (see below), whose sum is σ = 272615616. Its totient is φ = 175348800.

The previous prime is 223166659. The next prime is 223166693. The reversal of 223166665 is 566661322.

It is not a de Polignac number, because 223166665 - 2²⁵ = 189612233 is a prime.

It is a super-3 number, since 3×223166665³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

Its product of digits (77760) is a multiple of the sum of its prime divisors (3240).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73630 + ... + 76600.

It is an arithmetic number, because the mean of its divisors is an integer number (17038476).

Almost surely, 2^223166665 is an apocalyptic number.

It is an amenable number.

223166665 is a deficient number, since it is larger than the sum of its proper divisors (49448951).

223166665 is a wasteful number, since it uses less digits than its factorization.

223166665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3240.

The product of its digits is 77760, while the sum is 37.

The square root of 223166665 is about 14938.7638377478. The cubic root of 223166665 is about 606.5637347339.

The spelling of 223166665 in words is "two hundred twenty-three million, one hundred sixty-six thousand, six hundred sixty-five".