275805666 has 24 divisors (see below), whose sum is σ = 597917424. Its totient is φ = 91883160.

The previous prime is 275805641. The next prime is 275805679. The reversal of 275805666 is 666508572.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41301 + ... + 47511.

It is an arithmetic number, because the mean of its divisors is an integer number (24913226).

Almost surely, 2^275805666 is an apocalyptic number.

275805666 is an abundant number, since it is smaller than the sum of its proper divisors (322111758).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

275805666 is a wasteful number, since it uses less digits than its factorization.

275805666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8686 (or 8683 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 45.

The square root of 275805666 is about 16607.3979298384. The cubic root of 275805666 is about 650.9301602044.

The spelling of 275805666 in words is "two hundred seventy-five million, eight hundred five thousand, six hundred sixty-six".