66260439 has 24 divisors (see below), whose sum is σ = 109645952. Its totient is φ = 37771920.

The previous prime is 66260431. The next prime is 66260471. The reversal of 66260439 is 93406266.

It is not a de Polignac number, because 66260439 - 2³ = 66260431 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 (66260431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31944 + ... + 33954.

Almost surely, 2^66260439 is an apocalyptic number.

66260439 is a deficient number, since it is larger than the sum of its proper divisors (43385513).

66260439 is a wasteful number, since it uses less digits than its factorization.

66260439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2547 (or 2544 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

The square root of 66260439 is about 8140.0515354634. The cubic root of 66260439 is about 404.6548682930.

The spelling of 66260439 in words is "sixty-six million, two hundred sixty thousand, four hundred thirty-nine".