66141439 has 16 divisors (see below), whose sum is σ = 83302912. Its totient is φ = 51111648.

The previous prime is 66141437. The next prime is 66141443. The reversal of 66141439 is 93414166.

It is not a de Polignac number, because 66141439 - 2¹ = 66141437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66141437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4539 + ... + 12364.

It is an arithmetic number, because the mean of its divisors is an integer number (5206432).

Almost surely, 2^66141439 is an apocalyptic number.

66141439 is a deficient number, since it is larger than the sum of its proper divisors (17161473).

66141439 is a wasteful number, since it uses less digits than its factorization.

66141439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16966.

The product of its digits is 15552, while the sum is 34.

The square root of 66141439 is about 8132.7387146028. The cubic root of 66141439 is about 404.4124773778.

The spelling of 66141439 in words is "sixty-six million, one hundred forty-one thousand, four hundred thirty-nine".