66285489 has 8 divisors (see below), whose sum is σ = 90436192. Its totient is φ = 43162560.

The previous prime is 66285487. The next prime is 66285511. The reversal of 66285489 is 98458266.

It is a happy number.

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

It is not a de Polignac number, because 66285489 - 2¹ = 66285487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66285487) 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, 256792 + ... + 257049.

It is an arithmetic number, because the mean of its divisors is an integer number (11304524).

Almost surely, 2^66285489 is an apocalyptic number.

It is an amenable number.

66285489 is a deficient number, since it is larger than the sum of its proper divisors (24150703).

66285489 is a wasteful number, since it uses less digits than its factorization.

66285489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513887.

The product of its digits is 829440, while the sum is 48.

The square root of 66285489 is about 8141.5900781113. The cubic root of 66285489 is about 404.7058556166.

The spelling of 66285489 in words is "sixty-six million, two hundred eighty-five thousand, four hundred eighty-nine".