51166666 has 8 divisors (see below), whose sum is σ = 76793760. Its totient is φ = 25568748.

The previous prime is 51166663. The next prime is 51166667. The reversal of 51166666 is 66666115.

It is a sphenic number, since it is the product of 3 distinct primes.

51166666 is a modest number, since divided by 6666 gives 5116 as remainder.

It is not an unprimeable number, because it can be changed into a prime (51166663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2196 + ... + 10351.

It is an arithmetic number, because the mean of its divisors is an integer number (9599220).

Almost surely, 2^51166666 is an apocalyptic number.

51166666 is a deficient number, since it is larger than the sum of its proper divisors (25627094).

51166666 is a wasteful number, since it uses less digits than its factorization.

51166666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14588.

The product of its digits is 38880, while the sum is 37.

The square root of 51166666 is about 7153.0878646917. The cubic root of 51166666 is about 371.2465044432.

The spelling of 51166666 in words is "fifty-one million, one hundred sixty-six thousand, six hundred sixty-six".