566989665 has 48 divisors (see below), whose sum is σ = 1024223424. Its totient is φ = 267442560.

The previous prime is 566989649. The next prime is 566989669.

566989665 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 566989665 - 2⁴ = 566989649 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 566989599 and 566989608.

It is not an unprimeable number, because it can be changed into a prime (566989669) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 62934 + ... + 71376.

It is an arithmetic number, because the mean of its divisors is an integer number (21337988).

Almost surely, 2^566989665 is an apocalyptic number.

566989665 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

566989665 is a deficient number, since it is larger than the sum of its proper divisors (457233759).

566989665 is a wasteful number, since it uses less digits than its factorization.

566989665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8510 (or 8499 counting only the distinct ones).

The product of its digits is 20995200, while the sum is 60.

The square root of 566989665 is about 23811.5447839908. The cubic root of 566989665 is about 827.6722240511.

The spelling of 566989665 in words is "five hundred sixty-six million, nine hundred eighty-nine thousand, six hundred sixty-five".