566773661 has 4 divisors (see below), whose sum is σ = 566899872. Its totient is φ = 566647452.

The previous prime is 566773639. The next prime is 566773663. The reversal of 566773661 is 166377665.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 566773661 - 2¹⁴ = 566757277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (566773663) 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, 56111 + ... + 65436.

It is an arithmetic number, because the mean of its divisors is an integer number (141724968).

Almost surely, 2^566773661 is an apocalyptic number.

It is an amenable number.

566773661 is a deficient number, since it is larger than the sum of its proper divisors (126211).

566773661 is a wasteful number, since it uses less digits than its factorization.

566773661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126210.

The product of its digits is 952560, while the sum is 47.

The square root of 566773661 is about 23807.0086529156. The cubic root of 566773661 is about 827.5671056042.

The spelling of 566773661 in words is "five hundred sixty-six million, seven hundred seventy-three thousand, six hundred sixty-one".