66886886 has 8 divisors (see below), whose sum is σ = 109451304. Its totient is φ = 30403120.

The previous prime is 66886849. The next prime is 66886903. The reversal of 66886886 is 68868866.

It is a sphenic number, since it is the product of 3 distinct 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 in 3 ways as a sum of consecutive naturals, for example, 1520135 + ... + 1520178.

It is an arithmetic number, because the mean of its divisors is an integer number (13681413).

Almost surely, 2^66886886 is an apocalyptic number.

66886886 is a deficient number, since it is larger than the sum of its proper divisors (42564418).

66886886 is a wasteful number, since it uses less digits than its factorization.

66886886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3040326.

The product of its digits is 5308416, while the sum is 56.

The square root of 66886886 is about 8178.4403158549. The cubic root of 66886886 is about 405.9261151516.

The spelling of 66886886 in words is "sixty-six million, eight hundred eighty-six thousand, eight hundred eighty-six".