549899566 has 32 divisors (see below), whose sum is σ = 884505600. Its totient is φ = 255921120.

The previous prime is 549899563. The next prime is 549899579. The reversal of 549899566 is 665998945.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (549899563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 195631 + ... + 198421.

It is an arithmetic number, because the mean of its divisors is an integer number (27640800).

Almost surely, 2^549899566 is an apocalyptic number.

549899566 is a deficient number, since it is larger than the sum of its proper divisors (334606034).

549899566 is a wasteful number, since it uses less digits than its factorization.

549899566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2944.

The product of its digits is 20995200, while the sum is 61.

The square root of 549899566 is about 23449.9374412812. The cubic root of 549899566 is about 819.2713962238.

The spelling of 549899566 in words is "five hundred forty-nine million, eight hundred ninety-nine thousand, five hundred sixty-six".