66880199 has 2 divisors, whose sum is σ = 66880200. Its totient is φ = 66880198.

The previous prime is 66880157. The next prime is 66880211. The reversal of 66880199 is 99108866.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66880199 - 2¹⁶ = 66814663 is a prime.

It is a super-2 number, since 2×66880199² = 8945922036559202, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66880109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33440099 + 33440100.

It is an arithmetic number, because the mean of its divisors is an integer number (33440100).

Almost surely, 2^66880199 is an apocalyptic number.

66880199 is a deficient number, since it is larger than the sum of its proper divisors (1).

66880199 is an equidigital number, since it uses as much as digits as its factorization.

66880199 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 186624, while the sum is 47.

The square root of 66880199 is about 8178.0314868555. The cubic root of 66880199 is about 405.9125872462.

The spelling of 66880199 in words is "sixty-six million, eight hundred eighty thousand, one hundred ninety-nine".