66414169 has 2 divisors, whose sum is σ = 66414170. Its totient is φ = 66414168.

The previous prime is 66414163. The next prime is 66414199. The reversal of 66414169 is 96141466.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59059225 + 7354944 = 7685^2 + 2712^2 .

It is a cyclic number.

It is not a de Polignac number, because 66414169 - 2⁹ = 66413657 is a prime.

It is a super-2 number, since 2×66414169² = 8821683687921122, which contains 22 as substring.

It is equal to p_3919276 and since 66414169 and 3919276 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (66414163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33207084 + 33207085.

It is an arithmetic number, because the mean of its divisors is an integer number (33207085).

Almost surely, 2^66414169 is an apocalyptic number.

It is an amenable number.

66414169 is a deficient number, since it is larger than the sum of its proper divisors (1).

66414169 is an equidigital number, since it uses as much as digits as its factorization.

66414169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 37.

The square root of 66414169 is about 8149.4888796783. The cubic root of 66414169 is about 404.9675714522.

The spelling of 66414169 in words is "sixty-six million, four hundred fourteen thousand, one hundred sixty-nine".