66128614422 has 32 divisors (see below), whose sum is σ = 145743214848. Its totient is φ = 19874072736.

The previous prime is 66128614411. The next prime is 66128614439. The reversal of 66128614422 is 22441682166.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 9854818 + ... + 9861525.

It is an arithmetic number, because the mean of its divisors is an integer number (4554475464).

Almost surely, 2^66128614422 is an apocalyptic number.

66128614422 is an abundant number, since it is smaller than the sum of its proper divisors (79614600426).

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

66128614422 is a wasteful number, since it uses less digits than its factorization.

66128614422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19716404.

The product of its digits is 221184, while the sum is 42.

The spelling of 66128614422 in words is "sixty-six billion, one hundred twenty-eight million, six hundred fourteen thousand, four hundred twenty-two".