51201112066 has 16 divisors (see below), whose sum is σ = 83638812600. Its totient is φ = 23365761408.

The previous prime is 51201112021. The next prime is 51201112099. The reversal of 51201112066 is 66021110215.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 22531511025 + 28669601041 = 150105^2 + 169321^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 51201112066.

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, 11061021 + ... + 11065648.

Almost surely, 2^51201112066 is an apocalyptic number.

51201112066 is a deficient number, since it is larger than the sum of its proper divisors (32437700534).

51201112066 is a wasteful number, since it uses less digits than its factorization.

51201112066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22126773.

The product of its (nonzero) digits is 720, while the sum is 25.

The spelling of 51201112066 in words is "fifty-one billion, two hundred one million, one hundred twelve thousand, sixty-six".