166200552226 has 4 divisors (see below), whose sum is σ = 249300828342. Its totient is φ = 83100276112.

The previous prime is 166200552197. The next prime is 166200552251. The reversal of 166200552226 is 622255002661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 622255002661 = 601 ⋅1035366061.

It can be written as a sum of positive squares in only one way, i.e., 162730753201 + 3469799025 = 403399^2 + 58905^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41550138055 + ... + 41550138058.

Almost surely, 2^166200552226 is an apocalyptic number.

166200552226 is a deficient number, since it is larger than the sum of its proper divisors (83100276116).

166200552226 is an equidigital number, since it uses as much as digits as its factorization.

166200552226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83100276115.

The product of its (nonzero) digits is 86400, while the sum is 37.

Adding to 166200552226 its reverse (622255002661), we get a palindrome (788455554887).

The spelling of 166200552226 in words is "one hundred sixty-six billion, two hundred million, five hundred fifty-two thousand, two hundred twenty-six".