66289814 has 4 divisors (see below), whose sum is σ = 99434724. Its totient is φ = 33144906.

The previous prime is 66289801. The next prime is 66289823. The reversal of 66289814 is 41898266.

It is a happy number.

66289814 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16572452 + ... + 16572455.

It is an arithmetic number, because the mean of its divisors is an integer number (24858681).

Almost surely, 2^66289814 is an apocalyptic number.

66289814 is a deficient number, since it is larger than the sum of its proper divisors (33144910).

66289814 is a wasteful number, since it uses less digits than its factorization.

66289814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33144909.

The product of its digits is 165888, while the sum is 44.

The square root of 66289814 is about 8141.8556852845. The cubic root of 66289814 is about 404.7146575167.

The spelling of 66289814 in words is "sixty-six million, two hundred eighty-nine thousand, eight hundred fourteen".