66201604713 has 12 divisors (see below), whose sum is σ = 95654756340. Its totient is φ = 44120457216.

The previous prime is 66201604709. The next prime is 66201604727. The reversal of 66201604713 is 31740610266.

It is a happy number.

66201604713 is a `hidden beast` number, since 6 + 6 + 20 + 160 + 471 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 58084856064 + 8116748649 = 241008^2 + 90093^2 .

It is not a de Polignac number, because 66201604713 - 2² = 66201604709 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66201609713) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1132056 + ... + 1189097.

It is an arithmetic number, because the mean of its divisors is an integer number (7971229695).

Almost surely, 2^66201604713 is an apocalyptic number.

It is an amenable number.

66201604713 is a deficient number, since it is larger than the sum of its proper divisors (29453151627).

66201604713 is a wasteful number, since it uses less digits than its factorization.

66201604713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2324328 (or 2324325 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The spelling of 66201604713 in words is "sixty-six billion, two hundred one million, six hundred four thousand, seven hundred thirteen".