51666164 has 12 divisors (see below), whose sum is σ = 98635488. Its totient is φ = 23484600.

The previous prime is 51666163. The next prime is 51666193. The reversal of 51666164 is 46166615.

51666164 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51666163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 587072 + ... + 587159.

It is an arithmetic number, because the mean of its divisors is an integer number (8219624).

Almost surely, 2^51666164 is an apocalyptic number.

It is an amenable number.

51666164 is a deficient number, since it is larger than the sum of its proper divisors (46969324).

51666164 is a wasteful number, since it uses less digits than its factorization.

51666164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1174246 (or 1174244 counting only the distinct ones).

The product of its digits is 25920, while the sum is 35.

The square root of 51666164 is about 7187.9179182848. The cubic root of 51666164 is about 372.4506524422.

The spelling of 51666164 in words is "fifty-one million, six hundred sixty-six thousand, one hundred sixty-four".