1066641223 has 4 divisors (see below), whose sum is σ = 1067367808. Its totient is φ = 1065914640.

The previous prime is 1066641203. The next prime is 1066641229. The reversal of 1066641223 is 3221466601.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1066641223 - 2⁹ = 1066640711 is a prime.

It is a super-2 number, since 2×1066641223² = 2275446997205871458, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066641229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 361086 + ... + 364027.

It is an arithmetic number, because the mean of its divisors is an integer number (266841952).

Almost surely, 2^1066641223 is an apocalyptic number.

1066641223 is a deficient number, since it is larger than the sum of its proper divisors (726585).

1066641223 is an equidigital number, since it uses as much as digits as its factorization.

1066641223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726584.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 1066641223 is about 32659.4737097829. The cubic root of 1066641223 is about 1021.7377857427.

The spelling of 1066641223 in words is "one billion, sixty-six million, six hundred forty-one thousand, two hundred twenty-three".