561665033 has 2 divisors, whose sum is σ = 561665034. Its totient is φ = 561665032.

The previous prime is 561664969. The next prime is 561665047. The reversal of 561665033 is 330566165.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 558235129 + 3429904 = 23627^2 + 1852^2 .

It is a cyclic number.

It is not a de Polignac number, because 561665033 - 2⁶ = 561664969 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 561664984 and 561665002.

It is not a weakly prime, because it can be changed into another prime (561665063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280832516 + 280832517.

It is an arithmetic number, because the mean of its divisors is an integer number (280832517).

Almost surely, 2^561665033 is an apocalyptic number.

It is an amenable number.

561665033 is a deficient number, since it is larger than the sum of its proper divisors (1).

561665033 is an equidigital number, since it uses as much as digits as its factorization.

561665033 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48600, while the sum is 35.

The square root of 561665033 is about 23699.4732641888. The cubic root of 561665033 is about 825.0731654731.

The spelling of 561665033 in words is "five hundred sixty-one million, six hundred sixty-five thousand, thirty-three".