201166622689 has 4 divisors (see below), whose sum is σ = 201743031700. Its totient is φ = 200590213680.

The previous prime is 201166622669. The next prime is 201166622717. The reversal of 201166622689 is 986226661102.

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 170713580625 + 30453042064 = 413175^2 + 174508^2 .

It is a cyclic number.

It is not a de Polignac number, because 201166622689 - 2⁷ = 201166622561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201166622669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 288203982 + ... + 288204679.

It is an arithmetic number, because the mean of its divisors is an integer number (50435757925).

Almost surely, 2^201166622689 is an apocalyptic number.

It is an amenable number.

201166622689 is a deficient number, since it is larger than the sum of its proper divisors (576409011).

201166622689 is an equidigital number, since it uses as much as digits as its factorization.

201166622689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576409010.

The product of its (nonzero) digits is 746496, while the sum is 49.

The spelling of 201166622689 in words is "two hundred one billion, one hundred sixty-six million, six hundred twenty-two thousand, six hundred eighty-nine".