126666456442 has 16 divisors (see below), whose sum is σ = 204178769280. Its totient is φ = 58718075328.

The previous prime is 126666456439. The next prime is 126666456461. The reversal of 126666456442 is 244654666621.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 126666456442.

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, 27799842 + ... + 27804397.

It is an arithmetic number, because the mean of its divisors is an integer number (12761173080).

Almost surely, 2^126666456442 is an apocalyptic number.

126666456442 is a deficient number, since it is larger than the sum of its proper divisors (77512312838).

126666456442 is a wasteful number, since it uses less digits than its factorization.

126666456442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55604325.

The product of its digits is 9953280, while the sum is 52.

The spelling of 126666456442 in words is "one hundred twenty-six billion, six hundred sixty-six million, four hundred fifty-six thousand, four hundred forty-two".