566561401 has 4 divisors (see below), whose sum is σ = 647498752. Its totient is φ = 485624052.

The previous prime is 566561393. The next prime is 566561407. The reversal of 566561401 is 104165665.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 104165665 = 5 ⋅20833133.

It is a cyclic number.

It is not a de Polignac number, because 566561401 - 2³ = 566561393 is a prime.

It is a super-2 number, since 2×566561401² = 641983642206165602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (566561407) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 40468665 + ... + 40468678.

It is an arithmetic number, because the mean of its divisors is an integer number (161874688).

Almost surely, 2^566561401 is an apocalyptic number.

It is an amenable number.

566561401 is a deficient number, since it is larger than the sum of its proper divisors (80937351).

566561401 is an equidigital number, since it uses as much as digits as its factorization.

566561401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80937350.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 566561401 is about 23802.5503045367. The cubic root of 566561401 is about 827.4637831559.

The spelling of 566561401 in words is "five hundred sixty-six million, five hundred sixty-one thousand, four hundred one".