1066646255 has 4 divisors (see below), whose sum is σ = 1279975512. Its totient is φ = 853317000.

The previous prime is 1066646227. The next prime is 1066646279. The reversal of 1066646255 is 5526466601.

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

It is not a de Polignac number, because 1066646255 - 2²⁰ = 1065597679 is a prime.

It is a super-2 number, since 2×1066646255² = 2275468466611050050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106664621 + ... + 106664630.

It is an arithmetic number, because the mean of its divisors is an integer number (319993878).

Almost surely, 2^1066646255 is an apocalyptic number.

1066646255 is a deficient number, since it is larger than the sum of its proper divisors (213329257).

1066646255 is an equidigital number, since it uses as much as digits as its factorization.

1066646255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213329256.

The product of its (nonzero) digits is 259200, while the sum is 41.

The square root of 1066646255 is about 32659.5507470633. The cubic root of 1066646255 is about 1021.7393924612.

The spelling of 1066646255 in words is "one billion, sixty-six million, six hundred forty-six thousand, two hundred fifty-five".