66214449 has 32 divisors (see below), whose sum is σ = 118016000. Its totient is φ = 35843472.

The previous prime is 66214441. The next prime is 66214469. The reversal of 66214449 is 94441266.

It is not a de Polignac number, because 66214449 - 2³ = 66214441 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66214441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5629 + ... + 12810.

It is an arithmetic number, because the mean of its divisors is an integer number (3688000).

Almost surely, 2^66214449 is an apocalyptic number.

It is an amenable number.

66214449 is a deficient number, since it is larger than the sum of its proper divisors (51801551).

66214449 is a wasteful number, since it uses less digits than its factorization.

66214449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18474 (or 18468 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 66214449 is about 8137.2261244235. The cubic root of 66214449 is about 404.5612257669.

The spelling of 66214449 in words is "sixty-six million, two hundred fourteen thousand, four hundred forty-nine".