66899359 has 2 divisors, whose sum is σ = 66899360. Its totient is φ = 66899358.

The previous prime is 66899353. The next prime is 66899401. The reversal of 66899359 is 95399866.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66899359 - 2⁹ = 66898847 is a prime.

It is a super-2 number, since 2×66899359² = 8951048469221762, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66899353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33449679 + 33449680.

It is an arithmetic number, because the mean of its divisors is an integer number (33449680).

Almost surely, 2^66899359 is an apocalyptic number.

66899359 is a deficient number, since it is larger than the sum of its proper divisors (1).

66899359 is an equidigital number, since it uses as much as digits as its factorization.

66899359 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3149280, while the sum is 55.

The square root of 66899359 is about 8179.2028340175. The cubic root of 66899359 is about 405.9513458161.

The spelling of 66899359 in words is "sixty-six million, eight hundred ninety-nine thousand, three hundred fifty-nine".