66688846 has 16 divisors (see below), whose sum is σ = 114461280. Its totient is φ = 28546560.

The previous prime is 66688813. The next prime is 66688847. The reversal of 66688846 is 64888666.

It is a junction number, because it is equal to n+sod(n) for n = 66688793 and 66688802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66688847) 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 in 7 ways as a sum of consecutive naturals, for example, 11766 + ... + 16486.

It is an arithmetic number, because the mean of its divisors is an integer number (7153830).

Almost surely, 2^66688846 is an apocalyptic number.

66688846 is a deficient number, since it is larger than the sum of its proper divisors (47772434).

66688846 is a wasteful number, since it uses less digits than its factorization.

66688846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5739.

The product of its digits is 2654208, while the sum is 52.

The square root of 66688846 is about 8166.3238975686. The cubic root of 66688846 is about 405.5250944477.

The spelling of 66688846 in words is "sixty-six million, six hundred eighty-eight thousand, eight hundred forty-six".