51668651 has 8 divisors (see below), whose sum is σ = 54057024. Its totient is φ = 49334080.

The previous prime is 51668621. The next prime is 51668677. The reversal of 51668651 is 15686615.

51668651 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 51668651 - 2²² = 47474347 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51668621) 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 in 7 ways as a sum of consecutive naturals, for example, 11480 + ... + 15333.

It is an arithmetic number, because the mean of its divisors is an integer number (6757128).

Almost surely, 2^51668651 is an apocalyptic number.

51668651 is a deficient number, since it is larger than the sum of its proper divisors (2388373).

51668651 is a wasteful number, since it uses less digits than its factorization.

51668651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26901.

The product of its digits is 43200, while the sum is 38.

The square root of 51668651 is about 7188.0909148396. The cubic root of 51668651 is about 372.4566284353.

The spelling of 51668651 in words is "fifty-one million, six hundred sixty-eight thousand, six hundred fifty-one".