51668117 has 8 divisors (see below), whose sum is σ = 55273176. Its totient is φ = 48125952.

The previous prime is 51668063. The next prime is 51668119. The reversal of 51668117 is 71186615.

It can be written as a sum of positive squares in 4 ways, for example, as 31516996 + 20151121 = 5614^2 + 4489^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 51668117 - 2¹⁸ = 51405973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51668119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14018 + ... + 17315.

It is an arithmetic number, because the mean of its divisors is an integer number (6909147).

Almost surely, 2^51668117 is an apocalyptic number.

It is an amenable number.

51668117 is a deficient number, since it is larger than the sum of its proper divisors (3605059).

51668117 is a wasteful number, since it uses less digits than its factorization.

51668117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31447.

The product of its digits is 10080, while the sum is 35.

The square root of 51668117 is about 7188.0537699714. The cubic root of 51668117 is about 372.4553453070.

The spelling of 51668117 in words is "fifty-one million, six hundred sixty-eight thousand, one hundred seventeen".