122666320 has 80 divisors (see below), whose sum is σ = 327443328. Its totient is φ = 41863680.

The previous prime is 122666309. The next prime is 122666329. The reversal of 122666320 is 23666221.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122666329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 177175 + ... + 177865.

Almost surely, 2^122666320 is an apocalyptic number.

122666320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 122666320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163721664).

122666320 is an abundant number, since it is smaller than the sum of its proper divisors (204777008).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

122666320 is a wasteful number, since it uses less digits than its factorization.

122666320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1028 (or 1022 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 122666320 is about 11075.4828337188. The cubic root of 122666320 is about 496.8688595156.

Subtracting from 122666320 its reverse (23666221), we obtain a palindrome (99000099).

The spelling of 122666320 in words is "one hundred twenty-two million, six hundred sixty-six thousand, three hundred twenty".