563346666 has 12 divisors (see below), whose sum is σ = 1220584482. Its totient is φ = 187782216.

The previous prime is 563346649. The next prime is 563346673. The reversal of 563346666 is 666643365.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 546577641 + 16769025 = 23379^2 + 4095^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15648501 + ... + 15648536.

Almost surely, 2^563346666 is an apocalyptic number.

563346666 is an abundant number, since it is smaller than the sum of its proper divisors (657237816).

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

563346666 is a wasteful number, since it uses less digits than its factorization.

563346666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31297045 (or 31297042 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 45.

The square root of 563346666 is about 23734.9250262140. The cubic root of 563346666 is about 825.8957719366.

The spelling of 563346666 in words is "five hundred sixty-three million, three hundred forty-six thousand, six hundred sixty-six".