566621969 has 2 divisors, whose sum is σ = 566621970. Its totient is φ = 566621968.

The previous prime is 566621953. The next prime is 566621977. The reversal of 566621969 is 969126665.

566621969 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 551310400 + 15311569 = 23480^2 + 3913^2 .

It is a cyclic number.

It is not a de Polignac number, because 566621969 - 2⁴ = 566621953 is a prime.

It is a super-2 number, since 2×566621969² = 642120911506873922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (566621929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 283310984 + 283310985.

It is an arithmetic number, because the mean of its divisors is an integer number (283310985).

Almost surely, 2^566621969 is an apocalyptic number.

It is an amenable number.

566621969 is a deficient number, since it is larger than the sum of its proper divisors (1).

566621969 is an equidigital number, since it uses as much as digits as its factorization.

566621969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1049760, while the sum is 50.

The square root of 566621969 is about 23803.8225711754. The cubic root of 566621969 is about 827.4932686570.

The spelling of 566621969 in words is "five hundred sixty-six million, six hundred twenty-one thousand, nine hundred sixty-nine".