550524415666 has 4 divisors (see below), whose sum is σ = 825786623502. Its totient is φ = 275262207832.

The previous prime is 550524415663. The next prime is 550524415687. The reversal of 550524415666 is 666514425055.

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., 294989110641 + 255535305025 = 543129^2 + 505505^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (550524415663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137631103915 + ... + 137631103918.

Almost surely, 2^550524415666 is an apocalyptic number.

550524415666 is a deficient number, since it is larger than the sum of its proper divisors (275262207836).

550524415666 is a wasteful number, since it uses less digits than its factorization.

550524415666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275262207835.

The product of its (nonzero) digits is 4320000, while the sum is 49.

The spelling of 550524415666 in words is "five hundred fifty billion, five hundred twenty-four million, four hundred fifteen thousand, six hundred sixty-six".