51666338 has 16 divisors (see below), whose sum is σ = 78714720. Its totient is φ = 25430496.

The previous prime is 51666337. The next prime is 51666343. The reversal of 51666338 is 83366615.

It is not an unprimeable number, because it can be changed into a prime (51666331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90518 + ... + 91086.

It is an arithmetic number, because the mean of its divisors is an integer number (4919670).

Almost surely, 2^51666338 is an apocalyptic number.

51666338 is a deficient number, since it is larger than the sum of its proper divisors (27048382).

51666338 is a wasteful number, since it uses less digits than its factorization.

51666338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1201.

The product of its digits is 77760, while the sum is 38.

The square root of 51666338 is about 7187.9300219187. The cubic root of 51666338 is about 372.4510705517.

The spelling of 51666338 in words is "fifty-one million, six hundred sixty-six thousand, three hundred thirty-eight".