66717644012358 has 16 divisors (see below), whose sum is σ = 134810909551920. Its totient is φ = 22009944416256.

The previous prime is 66717644012207. The next prime is 66717644012359. The reversal of 66717644012358 is 85321044671766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66717644012359) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57317563003 + ... + 57317564166.

It is an arithmetic number, because the mean of its divisors is an integer number (8425681846995).

Almost surely, 2^{66717644012358} is an apocalyptic number.

66717644012358 is an abundant number, since it is smaller than the sum of its proper divisors (68093265539562).

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

66717644012358 is a wasteful number, since it uses less digits than its factorization.

66717644012358 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114635127271.

The product of its (nonzero) digits is 40642560, while the sum is 60.

The spelling of 66717644012358 in words is "sixty-six trillion, seven hundred seventeen billion, six hundred forty-four million, twelve thousand, three hundred fifty-eight".