66166665010 has 16 divisors (see below), whose sum is σ = 119520850176. Its totient is φ = 26373143088.

The previous prime is 66166664947. The next prime is 66166665023. The reversal of 66166665010 is 1056666166.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11687394 + ... + 11693053.

It is an arithmetic number, because the mean of its divisors is an integer number (7470053136).

Almost surely, 2^66166665010 is an apocalyptic number.

66166665010 is a deficient number, since it is larger than the sum of its proper divisors (53354185166).

66166665010 is a wasteful number, since it uses less digits than its factorization.

66166665010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23380737.

The product of its (nonzero) digits is 233280, while the sum is 43.

The spelling of 66166665010 in words is "sixty-six billion, one hundred sixty-six million, six hundred sixty-five thousand, ten".