66722750122 has 12 divisors (see below), whose sum is σ = 116424390690. Its totient is φ = 28595464296.

The previous prime is 66722750093. The next prime is 66722750131. The reversal of 66722750122 is 22105722766.

It can be written as a sum of positive squares in only one way, i.e., 38435210401 + 28287539721 = 196049^2 + 168189^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 340422097 + ... + 340422292.

Almost surely, 2^66722750122 is an apocalyptic number.

66722750122 is a deficient number, since it is larger than the sum of its proper divisors (49701640568).

66722750122 is a wasteful number, since it uses less digits than its factorization.

66722750122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680844405 (or 680844398 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 40.

The spelling of 66722750122 in words is "sixty-six billion, seven hundred twenty-two million, seven hundred fifty thousand, one hundred twenty-two".