66858682 has 32 divisors (see below), whose sum is σ = 117158400. Its totient is φ = 28292400.

The previous prime is 66858647. The next prime is 66858683. The reversal of 66858682 is 28685866.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (66858683) 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 15 ways as a sum of consecutive naturals, for example, 23307 + ... + 26017.

It is an arithmetic number, because the mean of its divisors is an integer number (3661200).

Almost surely, 2^66858682 is an apocalyptic number.

66858682 is a deficient number, since it is larger than the sum of its proper divisors (50299718).

66858682 is a wasteful number, since it uses less digits than its factorization.

66858682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2802.

The product of its digits is 1105920, while the sum is 49.

The square root of 66858682 is about 8176.7158443962. The cubic root of 66858682 is about 405.8690518995.

The spelling of 66858682 in words is "sixty-six million, eight hundred fifty-eight thousand, six hundred eighty-two".