122666261 has 4 divisors (see below), whose sum is σ = 129122400. Its totient is φ = 116210124.

The previous prime is 122666239. The next prime is 122666263. The reversal of 122666261 is 162666221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 122666261 - 2⁶ = 122666197 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 (122666263) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 3228041 + ... + 3228078.

It is an arithmetic number, because the mean of its divisors is an integer number (32280600).

Almost surely, 2^122666261 is an apocalyptic number.

It is an amenable number.

122666261 is a deficient number, since it is larger than the sum of its proper divisors (6456139).

122666261 is an equidigital number, since it uses as much as digits as its factorization.

122666261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6456138.

The product of its digits is 10368, while the sum is 32.

The square root of 122666261 is about 11075.4801701777. The cubic root of 122666261 is about 496.8687798544.

The spelling of 122666261 in words is "one hundred twenty-two million, six hundred sixty-six thousand, two hundred sixty-one".