66285439 has 8 divisors (see below), whose sum is σ = 72656640. Its totient is φ = 59971800.

The previous prime is 66285419. The next prime is 66285449. The reversal of 66285439 is 93458266.

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 66285439 - 2¹⁷ = 66154367 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66285395 and 66285404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66285419) 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, 11959 + ... + 16600.

It is an arithmetic number, because the mean of its divisors is an integer number (9082080).

Almost surely, 2^66285439 is an apocalyptic number.

66285439 is a deficient number, since it is larger than the sum of its proper divisors (6371201).

66285439 is a wasteful number, since it uses less digits than its factorization.

66285439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28781.

The product of its digits is 311040, while the sum is 43.

The square root of 66285439 is about 8141.5870074575. The cubic root of 66285439 is about 404.7057538583.

The spelling of 66285439 in words is "sixty-six million, two hundred eighty-five thousand, four hundred thirty-nine".