666233224 has 8 divisors (see below), whose sum is σ = 1249187310. Its totient is φ = 333116608.

The previous prime is 666233189. The next prime is 666233261. The reversal of 666233224 is 422332666.

It can be written as a sum of positive squares in only one way, i.e., 484792324 + 181440900 = 22018^2 + 13470^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×666233224² = 887733417522868352, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 666233224.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41639569 + ... + 41639584.

Almost surely, 2^666233224 is an apocalyptic number.

It is an amenable number.

666233224 is a deficient number, since it is larger than the sum of its proper divisors (582954086).

666233224 is a wasteful number, since it uses less digits than its factorization.

666233224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83279159 (or 83279155 counting only the distinct ones).

The product of its digits is 62208, while the sum is 34.

The square root of 666233224 is about 25811.4940288237. The cubic root of 666233224 is about 873.3911001679.

The spelling of 666233224 in words is "six hundred sixty-six million, two hundred thirty-three thousand, two hundred twenty-four".