66715662160 has 80 divisors (see below), whose sum is σ = 186603235200. Its totient is φ = 21670046208.

The previous prime is 66715662151. The next prime is 66715662203. The reversal of 66715662160 is 6126651766.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 66715662160.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3124495 + ... + 3145774.

It is an arithmetic number, because the mean of its divisors is an integer number (2332540440).

Almost surely, 2^66715662160 is an apocalyptic number.

It is an amenable number.

66715662160 is an abundant number, since it is smaller than the sum of its proper divisors (119887573040).

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

66715662160 is a wasteful number, since it uses less digits than its factorization.

66715662160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6270308 (or 6270302 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 46.

It can be divided in two parts, 667156 and 62160, that added together give a square (729316 = 854²).

The spelling of 66715662160 in words is "sixty-six billion, seven hundred fifteen million, six hundred sixty-two thousand, one hundred sixty".