51666884 has 6 divisors (see below), whose sum is σ = 90417054. Its totient is φ = 25833440.

The previous prime is 51666851. The next prime is 51666887. The reversal of 51666884 is 48866615.

51666884 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 45265984 + 6400900 = 6728^2 + 2530^2 .

It is not an unprimeable number, because it can be changed into a prime (51666887) 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 as a sum of consecutive naturals, namely, 6458357 + ... + 6458364.

It is an arithmetic number, because the mean of its divisors is an integer number (15069509).

Almost surely, 2^51666884 is an apocalyptic number.

It is an amenable number.

51666884 is a deficient number, since it is larger than the sum of its proper divisors (38750170).

51666884 is a wasteful number, since it uses less digits than its factorization.

51666884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12916725 (or 12916723 counting only the distinct ones).

The product of its digits is 276480, while the sum is 44.

The square root of 51666884 is about 7187.9680021547. The cubic root of 51666884 is about 372.4523825444.

The spelling of 51666884 in words is "fifty-one million, six hundred sixty-six thousand, eight hundred eighty-four".