66714447 has 8 divisors (see below), whose sum is σ = 88999344. Its totient is φ = 44452928.

The previous prime is 66714397. The next prime is 66714451. The reversal of 66714447 is 74441766.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66714447 - 2¹² = 66710351 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66714847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2533 + ... + 11825.

It is an arithmetic number, because the mean of its divisors is an integer number (11124918).

Almost surely, 2^66714447 is an apocalyptic number.

66714447 is a deficient number, since it is larger than the sum of its proper divisors (22284897).

66714447 is a wasteful number, since it uses less digits than its factorization.

66714447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11689.

The product of its digits is 112896, while the sum is 39.

The square root of 66714447 is about 8167.8912211170. The cubic root of 66714447 is about 405.5769797846.

It can be divided in two parts, 66714 and 447, that added together give a triangular number (67161 = T₃₆₆).

The spelling of 66714447 in words is "sixty-six million, seven hundred fourteen thousand, four hundred forty-seven".