566406021 has 8 divisors (see below), whose sum is σ = 773627904. Its totient is φ = 368394080.

The previous prime is 566405969. The next prime is 566406023. The reversal of 566406021 is 120604665.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 566406021 - 2⁷ = 566405893 is a prime.

It is a super-3 number, since 3×566406021³ (a number of 27 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 566406021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (566406023) 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 7 ways as a sum of consecutive naturals, for example, 2302341 + ... + 2302586.

It is an arithmetic number, because the mean of its divisors is an integer number (96703488).

Almost surely, 2^566406021 is an apocalyptic number.

It is an amenable number.

566406021 is a deficient number, since it is larger than the sum of its proper divisors (207221883).

566406021 is a wasteful number, since it uses less digits than its factorization.

566406021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4604971.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 566406021 is about 23799.2861447565. The cubic root of 566406021 is about 827.3881319980.

The spelling of 566406021 in words is "five hundred sixty-six million, four hundred six thousand, twenty-one".