66606506051610 has 64 divisors (see below), whose sum is σ = 182729716925184. Its totient is φ = 15221212070400.

The previous prime is 66606506051507. The next prime is 66606506051651. The reversal of 66606506051610 is 1615060560666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 66606506051610.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31603531 + ... + 33645150.

It is an arithmetic number, because the mean of its divisors is an integer number (2855151826956).

Almost surely, 2^{66606506051610} is an apocalyptic number.

66606506051610 is an abundant number, since it is smaller than the sum of its proper divisors (116123210873574).

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

66606506051610 is a wasteful number, since it uses less digits than its factorization.

66606506051610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65253559.

The product of its (nonzero) digits is 1166400, while the sum is 48.

The spelling of 66606506051610 in words is "sixty-six trillion, six hundred six billion, five hundred six million, fifty-one thousand, six hundred ten".