66570660745 has 8 divisors (see below), whose sum is σ = 79898958216. Its totient is φ = 53247085056.

The previous prime is 66570660733. The next prime is 66570660787. The reversal of 66570660745 is 54706607566.

It can be written as a sum of positive squares in 4 ways, for example, as 32398920009 + 34171740736 = 179997^2 + 184856^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66570660745 - 2⁵ = 66570660713 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66570660692 and 66570660701.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1149352 + ... + 1205881.

It is an arithmetic number, because the mean of its divisors is an integer number (9987369777).

Almost surely, 2^66570660745 is an apocalyptic number.

It is an amenable number.

66570660745 is a deficient number, since it is larger than the sum of its proper divisors (13328297471).

66570660745 is a wasteful number, since it uses less digits than its factorization.

66570660745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2360891.

The product of its (nonzero) digits is 6350400, while the sum is 52.

The spelling of 66570660745 in words is "sixty-six billion, five hundred seventy million, six hundred sixty thousand, seven hundred forty-five".