122666406 has 16 divisors (see below), whose sum is σ = 255999744. Its totient is φ = 39110984.

The previous prime is 122666399. The next prime is 122666437. The reversal of 122666406 is 604666221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 444306 + ... + 444581.

It is an arithmetic number, because the mean of its divisors is an integer number (15999984).

Almost surely, 2^122666406 is an apocalyptic number.

122666406 is an abundant number, since it is smaller than the sum of its proper divisors (133333338).

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

122666406 is a wasteful number, since it uses less digits than its factorization.

122666406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888915.

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 122666406 is about 11075.4867161674. The cubic root of 122666406 is about 496.8689756320.

The spelling of 122666406 in words is "one hundred twenty-two million, six hundred sixty-six thousand, four hundred six".