66382447 has 8 divisors (see below), whose sum is σ = 71195760. Its totient is φ = 61701120.

The previous prime is 66382429. The next prime is 66382451. The reversal of 66382447 is 74428366.

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 66382447 - 2⁷ = 66382319 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66382427) 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, 31954 + ... + 33967.

It is an arithmetic number, because the mean of its divisors is an integer number (8899470).

Almost surely, 2^66382447 is an apocalyptic number.

66382447 is a deficient number, since it is larger than the sum of its proper divisors (4813313).

66382447 is a wasteful number, since it uses less digits than its factorization.

66382447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65993.

The product of its digits is 193536, while the sum is 40.

The square root of 66382447 is about 8147.5423901935. The cubic root of 66382447 is about 404.9030850765.

The spelling of 66382447 in words is "sixty-six million, three hundred eighty-two thousand, four hundred forty-seven".