122666543 has 4 divisors (see below), whose sum is σ = 129882240. Its totient is φ = 115450848.

The previous prime is 122666519. The next prime is 122666561. The reversal of 122666543 is 345666221.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 122666543 - 2¹⁰ = 122665519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122666513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3607823 + ... + 3607856.

It is an arithmetic number, because the mean of its divisors is an integer number (32470560).

Almost surely, 2^122666543 is an apocalyptic number.

122666543 is a deficient number, since it is larger than the sum of its proper divisors (7215697).

122666543 is an equidigital number, since it uses as much as digits as its factorization.

122666543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7215696.

The product of its digits is 51840, while the sum is 35.

The square root of 122666543 is about 11075.4929009954. The cubic root of 122666543 is about 496.8691606080.

The spelling of 122666543 in words is "one hundred twenty-two million, six hundred sixty-six thousand, five hundred forty-three".