66414239 has 2 divisors, whose sum is σ = 66414240. Its totient is φ = 66414238.

The previous prime is 66414211. The next prime is 66414277. The reversal of 66414239 is 93241466.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66414239 is a prime.

It is a super-2 number, since 2×66414239² = 8821702283898242, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 66414199 and 66414208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66414209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33207119 + 33207120.

It is an arithmetic number, because the mean of its divisors is an integer number (33207120).

Almost surely, 2^66414239 is an apocalyptic number.

66414239 is a deficient number, since it is larger than the sum of its proper divisors (1).

66414239 is an equidigital number, since it uses as much as digits as its factorization.

66414239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 35.

The square root of 66414239 is about 8149.4931744250. The cubic root of 66414239 is about 404.9677137296.

The spelling of 66414239 in words is "sixty-six million, four hundred fourteen thousand, two hundred thirty-nine".