566161166138 has 4 divisors (see below), whose sum is σ = 849241749210. Its totient is φ = 283080583068.

The previous prime is 566161166111. The next prime is 566161166159. The reversal of 566161166138 is 831661161665.

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

It can be written as a sum of positive squares in only one way, i.e., 322388890849 + 243772275289 = 567793^2 + 493733^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 141540291533 + ... + 141540291536.

Almost surely, 2^566161166138 is an apocalyptic number.

566161166138 is a deficient number, since it is larger than the sum of its proper divisors (283080583072).

566161166138 is a wasteful number, since it uses less digits than its factorization.

566161166138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283080583071.

The product of its digits is 933120, while the sum is 50.

The spelling of 566161166138 in words is "five hundred sixty-six billion, one hundred sixty-one million, one hundred sixty-six thousand, one hundred thirty-eight".