566217221401 has 4 divisors (see below), whose sum is σ = 609772392292. Its totient is φ = 522662050512.

The previous prime is 566217221399. The next prime is 566217221447. The reversal of 566217221401 is 104122712665.

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 134010905625 + 432206315776 = 366075^2 + 657424^2 .

It is a cyclic number.

It is not a de Polignac number, because 566217221401 - 2¹ = 566217221399 is a prime.

It is a super-2 number, since 2×566217221401² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (566217221501) 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, 21777585426 + ... + 21777585451.

It is an arithmetic number, because the mean of its divisors is an integer number (152443098073).

Almost surely, 2^566217221401 is an apocalyptic number.

It is an amenable number.

566217221401 is a deficient number, since it is larger than the sum of its proper divisors (43555170891).

566217221401 is a wasteful number, since it uses less digits than its factorization.

566217221401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43555170890.

The product of its (nonzero) digits is 40320, while the sum is 37.

The spelling of 566217221401 in words is "five hundred sixty-six billion, two hundred seventeen million, two hundred twenty-one thousand, four hundred one".