66252447 has 12 divisors (see below), whose sum is σ = 96122520. Its totient is φ = 43972368.

The previous prime is 66252419. The next prime is 66252467. The reversal of 66252447 is 74425266.

66252447 is a `hidden beast` number, since 6 + 625 + 24 + 4 + 7 = 666.

It is not a de Polignac number, because 66252447 - 2²⁰ = 65203871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66252467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14172 + ... + 18257.

It is an arithmetic number, because the mean of its divisors is an integer number (8010210).

Almost surely, 2^66252447 is an apocalyptic number.

66252447 is a deficient number, since it is larger than the sum of its proper divisors (29870073).

66252447 is a wasteful number, since it uses less digits than its factorization.

66252447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32662 (or 32659 counting only the distinct ones).

The product of its digits is 80640, while the sum is 36.

The square root of 66252447 is about 8139.5606146769. The cubic root of 66252447 is about 404.6385984957.

The spelling of 66252447 in words is "sixty-six million, two hundred fifty-two thousand, four hundred forty-seven".