66407125126 has 16 divisors (see below), whose sum is σ = 105550906896. Its totient is φ = 31226480896.

The previous prime is 66407125111. The next prime is 66407125129. The reversal of 66407125126 is 62152170466.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66407125129) 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, 702751 + ... + 791626.

It is an arithmetic number, because the mean of its divisors is an integer number (6596931681).

Almost surely, 2^66407125126 is an apocalyptic number.

66407125126 is a deficient number, since it is larger than the sum of its proper divisors (39143781770).

66407125126 is a wasteful number, since it uses less digits than its factorization.

66407125126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1495703.

The product of its (nonzero) digits is 120960, while the sum is 40.

The spelling of 66407125126 in words is "sixty-six billion, four hundred seven million, one hundred twenty-five thousand, one hundred twenty-six".