66280847 has 8 divisors (see below), whose sum is σ = 67072896. Its totient is φ = 65493792.

The previous prime is 66280783. The next prime is 66280859. The reversal of 66280847 is 74808266.

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 66280847 - 2⁶ = 66280783 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 (66280867) 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, 29858 + ... + 32000.

It is an arithmetic number, because the mean of its divisors is an integer number (8384112).

Almost surely, 2^66280847 is an apocalyptic number.

66280847 is a deficient number, since it is larger than the sum of its proper divisors (792049).

66280847 is a wasteful number, since it uses less digits than its factorization.

66280847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2497.

The product of its (nonzero) digits is 129024, while the sum is 41.

The square root of 66280847 is about 8141.3049936727. The cubic root of 66280847 is about 404.6964081570.

The spelling of 66280847 in words is "sixty-six million, two hundred eighty thousand, eight hundred forty-seven".