51660023 has 2 divisors, whose sum is σ = 51660024. Its totient is φ = 51660022.

The previous prime is 51660019. The next prime is 51660073. The reversal of 51660023 is 32006615.

51660023 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51660023 - 2² = 51660019 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51660073) 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 as a sum of consecutive naturals, namely, 25830011 + 25830012.

It is an arithmetic number, because the mean of its divisors is an integer number (25830012).

Almost surely, 2^51660023 is an apocalyptic number.

51660023 is a deficient number, since it is larger than the sum of its proper divisors (1).

51660023 is an equidigital number, since it uses as much as digits as its factorization.

51660023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 51660023 is about 7187.4907304288. The cubic root of 51660023 is about 372.4358954594.

Adding to 51660023 its reverse (32006615), we get a palindrome (83666638).

The spelling of 51660023 in words is "fifty-one million, six hundred sixty thousand, twenty-three".