66125520102606 has 16 divisors (see below), whose sum is σ = 133535030888064. Its totient is φ = 21827841587064.

The previous prime is 66125520102559. The next prime is 66125520102637. The reversal of 66125520102606 is 60620102552166.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53499611116 + ... + 53499612351.

It is an arithmetic number, because the mean of its divisors is an integer number (8345939430504).

Almost surely, 2^{66125520102606} is an apocalyptic number.

66125520102606 is an abundant number, since it is smaller than the sum of its proper divisors (67409510785458).

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

66125520102606 is a wasteful number, since it uses less digits than its factorization.

66125520102606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106999223575.

The product of its (nonzero) digits is 259200, while the sum is 42.

The spelling of 66125520102606 in words is "sixty-six trillion, one hundred twenty-five billion, five hundred twenty million, one hundred two thousand, six hundred six".