66562139522 has 6 divisors (see below), whose sum is σ = 99843756579. Its totient is φ = 33280887330.

The previous prime is 66562139509. The next prime is 66562139537. The reversal of 66562139522 is 22593126566.

It can be written as a sum of positive squares in only one way, i.e., 33281069761 + 33281069761 = 182431^2 + 182431^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=182431.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 273647 + ... + 456077.

Almost surely, 2^66562139522 is an apocalyptic number.

66562139522 is a deficient number, since it is larger than the sum of its proper divisors (33281617057).

66562139522 is an frugal number, since it uses more digits than its factorization.

66562139522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364864 (or 182433 counting only the distinct ones).

The product of its digits is 1166400, while the sum is 47.

The spelling of 66562139522 in words is "sixty-six billion, five hundred sixty-two million, one hundred thirty-nine thousand, five hundred twenty-two".