51302116166666 has 4 divisors (see below), whose sum is σ = 76953174250002. Its totient is φ = 25651058083332.

The previous prime is 51302116166641. The next prime is 51302116166669. The reversal of 51302116166666 is 66666161120315.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 34700688151441 + 16601428015225 = 5890729^2 + 4074485^2 .

It is not an unprimeable number, because it can be changed into a prime (51302116166669) by changing a digit.

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 as a sum of consecutive naturals, namely, 12825529041665 + ... + 12825529041668.

Almost surely, 2^{51302116166666} is an apocalyptic number.

51302116166666 is a deficient number, since it is larger than the sum of its proper divisors (25651058083336).

51302116166666 is a wasteful number, since it uses less digits than its factorization.

51302116166666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25651058083335.

The product of its (nonzero) digits is 1399680, while the sum is 50.

The spelling of 51302116166666 in words is "fifty-one trillion, three hundred two billion, one hundred sixteen million, one hundred sixty-six thousand, six hundred sixty-six".