66214469 has 2 divisors, whose sum is σ = 66214470. Its totient is φ = 66214468.

The previous prime is 66214441. The next prime is 66214483. The reversal of 66214469 is 96441266.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36457444 + 29757025 = 6038^2 + 5455^2 .

It is a cyclic number.

It is not a de Polignac number, because 66214469 - 2¹² = 66210373 is a prime.

It is a super-2 number, since 2×66214469² = 8768711809903922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66214409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33107234 + 33107235.

It is an arithmetic number, because the mean of its divisors is an integer number (33107235).

Almost surely, 2^66214469 is an apocalyptic number.

It is an amenable number.

66214469 is a deficient number, since it is larger than the sum of its proper divisors (1).

66214469 is an equidigital number, since it uses as much as digits as its factorization.

66214469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 38.

The square root of 66214469 is about 8137.2273533434. The cubic root of 66214469 is about 404.5612664993.

The spelling of 66214469 in words is "sixty-six million, two hundred fourteen thousand, four hundred sixty-nine".