66010866 has 16 divisors (see below), whose sum is σ = 132269664. Its totient is φ = 21962304.

The previous prime is 66010859. The next prime is 66010877. The reversal of 66010866 is 66801066.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6775 + ... + 13338.

It is an arithmetic number, because the mean of its divisors is an integer number (8266854).

Almost surely, 2^66010866 is an apocalyptic number.

66010866 is an abundant number, since it is smaller than the sum of its proper divisors (66258798).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66010866 is a wasteful number, since it uses less digits than its factorization.

66010866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20665.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 66010866 is about 8124.7071331833. The cubic root of 66010866 is about 404.1461786806.

The spelling of 66010866 in words is "sixty-six million, ten thousand, eight hundred sixty-six".