66437023 has 2 divisors, whose sum is σ = 66437024. Its totient is φ = 66437022.

The previous prime is 66437011. The next prime is 66437039. The reversal of 66437023 is 32073466.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66437023 - 2¹⁷ = 66305951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66437083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33218511 + 33218512.

It is an arithmetic number, because the mean of its divisors is an integer number (33218512).

Almost surely, 2^66437023 is an apocalyptic number.

66437023 is a deficient number, since it is larger than the sum of its proper divisors (1).

66437023 is an equidigital number, since it uses as much as digits as its factorization.

66437023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 31.

The square root of 66437023 is about 8150.8909328981. The cubic root of 66437023 is about 405.0140177031.

The spelling of 66437023 in words is "sixty-six million, four hundred thirty-seven thousand, twenty-three".