66843814 has 16 divisors (see below), whose sum is σ = 102920400. Its totient is φ = 32547744.

The previous prime is 66843809. The next prime is 66843839. The reversal of 66843814 is 41834866.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10264 + ... + 15460.

It is an arithmetic number, because the mean of its divisors is an integer number (6432525).

Almost surely, 2^66843814 is an apocalyptic number.

66843814 is a deficient number, since it is larger than the sum of its proper divisors (36076586).

66843814 is a wasteful number, since it uses less digits than its factorization.

66843814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5367.

The product of its digits is 110592, while the sum is 40.

The square root of 66843814 is about 8175.8066268717. The cubic root of 66843814 is about 405.8389640173.

The spelling of 66843814 in words is "sixty-six million, eight hundred forty-three thousand, eight hundred fourteen".