66106859 has 16 divisors (see below), whose sum is σ = 82703040. Its totient is φ = 51442560.

The previous prime is 66106813. The next prime is 66106877. The reversal of 66106859 is 95860166.

It is not a de Polignac number, because 66106859 - 2¹² = 66102763 is a prime.

It is a super-3 number, since 3×66106859³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (66106889) 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, 404 + ... + 11505.

It is an arithmetic number, because the mean of its divisors is an integer number (5168940).

Almost surely, 2^66106859 is an apocalyptic number.

66106859 is a deficient number, since it is larger than the sum of its proper divisors (16596181).

66106859 is a wasteful number, since it uses less digits than its factorization.

66106859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11990.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 66106859 is about 8130.6124615554. The cubic root of 66106859 is about 404.3419869181.

The spelling of 66106859 in words is "sixty-six million, one hundred six thousand, eight hundred fifty-nine".