51165072166 has 16 divisors (see below), whose sum is σ = 82696487328. Its totient is φ = 23601729600.

The previous prime is 51165072163. The next prime is 51165072181. The reversal of 51165072166 is 66127056115.

It is a super-3 number, since 3×51165072166³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51165072163) 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 in 7 ways as a sum of consecutive naturals, for example, 489775 + ... + 584986.

It is an arithmetic number, because the mean of its divisors is an integer number (5168530458).

Almost surely, 2^51165072166 is an apocalyptic number.

51165072166 is a deficient number, since it is larger than the sum of its proper divisors (31531415162).

51165072166 is a wasteful number, since it uses less digits than its factorization.

51165072166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1076607.

The product of its (nonzero) digits is 75600, while the sum is 40.

The spelling of 51165072166 in words is "fifty-one billion, one hundred sixty-five million, seventy-two thousand, one hundred sixty-six".