51666874 has 24 divisors (see below), whose sum is σ = 92596500. Its totient is φ = 21542976.

The previous prime is 51666851. The next prime is 51666887. The reversal of 51666874 is 47866615.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 45630025 + 6036849 = 6755^2 + 2457^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 51666874.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3499 + ... + 10750.

Almost surely, 2^51666874 is an apocalyptic number.

51666874 is a deficient number, since it is larger than the sum of its proper divisors (40929626).

51666874 is a wasteful number, since it uses less digits than its factorization.

51666874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14302 (or 14295 counting only the distinct ones).

The product of its digits is 241920, while the sum is 43.

The square root of 51666874 is about 7187.9673065478. The cubic root of 51666874 is about 372.4523585153.

The spelling of 51666874 in words is "fifty-one million, six hundred sixty-six thousand, eight hundred seventy-four".