566720401 has 4 divisors (see below), whose sum is σ = 610314292. Its totient is φ = 523126512.

The previous prime is 566720387. The next prime is 566720411. The reversal of 566720401 is 104027665.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 189778176 + 376942225 = 13776^2 + 19415^2 .

It is a cyclic number.

It is not a de Polignac number, because 566720401 - 2⁵ = 566720369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (566720411) 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, 21796926 + ... + 21796951.

It is an arithmetic number, because the mean of its divisors is an integer number (152578573).

Almost surely, 2^566720401 is an apocalyptic number.

It is an amenable number.

566720401 is a deficient number, since it is larger than the sum of its proper divisors (43593891).

566720401 is a wasteful number, since it uses less digits than its factorization.

566720401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43593890.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 566720401 is about 23805.8900484733. The cubic root of 566720401 is about 827.5411824960.

The spelling of 566720401 in words is "five hundred sixty-six million, seven hundred twenty thousand, four hundred one".