1066655223 has 60 divisors (see below), whose sum is σ = 1678297104. Its totient is φ = 674956800.

The previous prime is 1066655197. The next prime is 1066655267. The reversal of 1066655223 is 3225566601.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-1066655223 is a prime.

It is a super-2 number, since 2×1066655223² = 2275506729506359458, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066655923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 5526615 + ... + 5526807.

Almost surely, 2^1066655223 is an apocalyptic number.

1066655223 is a deficient number, since it is larger than the sum of its proper divisors (611641881).

1066655223 is an equidigital number, since it uses as much as digits as its factorization.

1066655223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338 (or 298 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 1066655223 is about 32659.6880419884. The cubic root of 1066655223 is about 1021.7422559326.

The spelling of 1066655223 in words is "one billion, sixty-six million, six hundred fifty-five thousand, two hundred twenty-three".