66466859 has 2 divisors, whose sum is σ = 66466860. Its totient is φ = 66466858.

The previous prime is 66466801. The next prime is 66466861. The reversal of 66466859 is 95866466.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66466859 - 2¹⁶ = 66401323 is a prime.

It is a super-3 number, since 3×66466859³ (a number of 24 digits) contains 333 as substring.

Together with 66466861, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66466879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33233429 + 33233430.

It is an arithmetic number, because the mean of its divisors is an integer number (33233430).

Almost surely, 2^66466859 is an apocalyptic number.

66466859 is a deficient number, since it is larger than the sum of its proper divisors (1).

66466859 is an equidigital number, since it uses as much as digits as its factorization.

66466859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1866240, while the sum is 50.

The square root of 66466859 is about 8152.7209568340. The cubic root of 66466859 is about 405.0746374661.

The spelling of 66466859 in words is "sixty-six million, four hundred sixty-six thousand, eight hundred fifty-nine".