51666165015 has 16 divisors (see below), whose sum is σ = 83830173696. Its totient is φ = 27167184800.

The previous prime is 51666165007. The next prime is 51666165037. The reversal of 51666165015 is 51056166615.

It is not a de Polignac number, because 51666165015 - 2³ = 51666165007 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24255351 + ... + 24257480.

It is an arithmetic number, because the mean of its divisors is an integer number (5239385856).

Almost surely, 2^51666165015 is an apocalyptic number.

51666165015 is a deficient number, since it is larger than the sum of its proper divisors (32164008681).

51666165015 is a wasteful number, since it uses less digits than its factorization.

51666165015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48512910.

The product of its (nonzero) digits is 162000, while the sum is 42.

The spelling of 51666165015 in words is "fifty-one billion, six hundred sixty-six million, one hundred sixty-five thousand, fifteen".