66881014 has 4 divisors (see below), whose sum is σ = 100321524. Its totient is φ = 33440506.

The previous prime is 66880999. The next prime is 66881027. The reversal of 66881014 is 41018866.

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 (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16720252 + ... + 16720255.

It is an arithmetic number, because the mean of its divisors is an integer number (25080381).

Almost surely, 2^66881014 is an apocalyptic number.

66881014 is a deficient number, since it is larger than the sum of its proper divisors (33440510).

66881014 is a wasteful number, since it uses less digits than its factorization.

66881014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33440509.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 66881014 is about 8178.0813153208. The cubic root of 66881014 is about 405.9142360522.

The spelling of 66881014 in words is "sixty-six million, eight hundred eighty-one thousand, fourteen".