563620666 has 32 divisors (see below), whose sum is σ = 977633280. Its totient is φ = 238711536.

The previous prime is 563620639. The next prime is 563620697. The reversal of 563620666 is 666026365.

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 15 ways as a sum of consecutive naturals, for example, 637861 + ... + 638743.

It is an arithmetic number, because the mean of its divisors is an integer number (30551040).

Almost surely, 2^563620666 is an apocalyptic number.

563620666 is a deficient number, since it is larger than the sum of its proper divisors (414012614).

563620666 is a wasteful number, since it uses less digits than its factorization.

563620666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1378.

The product of its (nonzero) digits is 233280, while the sum is 40.

The square root of 563620666 is about 23740.6964093305. The cubic root of 563620666 is about 826.0296496929.

The spelling of 563620666 in words is "five hundred sixty-three million, six hundred twenty thousand, six hundred sixty-six".