66516325422 has 16 divisors (see below), whose sum is σ = 133097474640. Its totient is φ = 22161304512.

The previous prime is 66516325399. The next prime is 66516325423. The reversal of 66516325422 is 22452361566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66516325423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2687647 + ... + 2712282.

It is an arithmetic number, because the mean of its divisors is an integer number (8318592165).

Almost surely, 2^66516325422 is an apocalyptic number.

66516325422 is an abundant number, since it is smaller than the sum of its proper divisors (66581149218).

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

66516325422 is a wasteful number, since it uses less digits than its factorization.

66516325422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5401987.

The product of its digits is 518400, while the sum is 42.

Adding to 66516325422 its reverse (22452361566), we get a palindrome (88968686988).

The spelling of 66516325422 in words is "sixty-six billion, five hundred sixteen million, three hundred twenty-five thousand, four hundred twenty-two".