122666251 has 8 divisors (see below), whose sum is σ = 125083440. Its totient is φ = 120260448.

The previous prime is 122666239. The next prime is 122666263. The reversal of 122666251 is 152666221.

It is an interprime number because it is at equal distance from previous prime (122666239) and next prime (122666263).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 122666251 - 2²³ = 114277643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122666231) 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 7 ways as a sum of consecutive naturals, for example, 20805 + ... + 26041.

It is an arithmetic number, because the mean of its divisors is an integer number (15635430).

Almost surely, 2^122666251 is an apocalyptic number.

122666251 is a deficient number, since it is larger than the sum of its proper divisors (2417189).

122666251 is an equidigital number, since it uses as much as digits as its factorization.

122666251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5693.

The product of its digits is 8640, while the sum is 31.

The square root of 122666251 is about 11075.4797187300. The cubic root of 122666251 is about 496.8687663524.

The spelling of 122666251 in words is "one hundred twenty-two million, six hundred sixty-six thousand, two hundred fifty-one".