1066645505 has 4 divisors (see below), whose sum is σ = 1279974612. Its totient is φ = 853316400.

The previous prime is 1066645477. The next prime is 1066645507. The reversal of 1066645505 is 5055466601.

1066645505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 750979216 + 315666289 = 27404^2 + 17767^2 .

It is not a de Polignac number, because 1066645505 - 2⁸ = 1066645249 is a prime.

It is a super-2 number, since 2×1066645505² = 2275465266673410050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1066645507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106664546 + ... + 106664555.

It is an arithmetic number, because the mean of its divisors is an integer number (319993653).

Almost surely, 2^1066645505 is an apocalyptic number.

It is an amenable number.

1066645505 is a deficient number, since it is larger than the sum of its proper divisors (213329107).

1066645505 is an equidigital number, since it uses as much as digits as its factorization.

1066645505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213329106.

The product of its (nonzero) digits is 108000, while the sum is 38.

The square root of 1066645505 is about 32659.5392649682. The cubic root of 1066645505 is about 1021.7391529864.

The spelling of 1066645505 in words is "one billion, sixty-six million, six hundred forty-five thousand, five hundred five".