51668457 has 16 divisors (see below), whose sum is σ = 74037312. Its totient is φ = 31933440.

The previous prime is 51668443. The next prime is 51668473. The reversal of 51668457 is 75486615.

51668457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51668457 - 2⁷ = 51668329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51668417) 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 15 ways as a sum of consecutive naturals, for example, 4144 + ... + 10977.

It is an arithmetic number, because the mean of its divisors is an integer number (4627332).

Almost surely, 2^51668457 is an apocalyptic number.

It is an amenable number.

51668457 is a deficient number, since it is larger than the sum of its proper divisors (22368855).

51668457 is a wasteful number, since it uses less digits than its factorization.

51668457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15208.

The product of its digits is 201600, while the sum is 42.

The square root of 51668457 is about 7188.0774202842. The cubic root of 51668457 is about 372.4561622811.

It can be divided in two parts, 51668 and 457, that added together give a palindrome (52125).

The spelling of 51668457 in words is "fifty-one million, six hundred sixty-eight thousand, four hundred fifty-seven".