66414199 has 2 divisors, whose sum is σ = 66414200. Its totient is φ = 66414198.

The previous prime is 66414169. The next prime is 66414209. The reversal of 66414199 is 99141466.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66414199 - 2²¹ = 64317047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66414119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33207099 + 33207100.

It is an arithmetic number, because the mean of its divisors is an integer number (33207100).

Almost surely, 2^66414199 is an apocalyptic number.

66414199 is a deficient number, since it is larger than the sum of its proper divisors (1).

66414199 is an equidigital number, since it uses as much as digits as its factorization.

66414199 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 40.

The square root of 66414199 is about 8149.4907202843. The cubic root of 66414199 is about 404.9676324282.

The spelling of 66414199 in words is "sixty-six million, four hundred fourteen thousand, one hundred ninety-nine".