66886814 has 4 divisors (see below), whose sum is σ = 100330224. Its totient is φ = 33443406.

The previous prime is 66886811. The next prime is 66886849. The reversal of 66886814 is 41868866.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66886811) 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 as a sum of consecutive naturals, namely, 16721702 + ... + 16721705.

It is an arithmetic number, because the mean of its divisors is an integer number (25082556).

Almost surely, 2^66886814 is an apocalyptic number.

66886814 is a deficient number, since it is larger than the sum of its proper divisors (33443410).

66886814 is a wasteful number, since it uses less digits than its factorization.

66886814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33443409.

The product of its digits is 442368, while the sum is 47.

The square root of 66886814 is about 8178.4359140364. The cubic root of 66886814 is about 405.9259694993.

The spelling of 66886814 in words is "sixty-six million, eight hundred eighty-six thousand, eight hundred fourteen".