670660565121 has 6 divisors (see below), whose sum is σ = 968731927410. Its totient is φ = 447107043408.

The previous prime is 670660565111. The next prime is 670660565129. The reversal of 670660565121 is 121565066076.

670660565121 is a `hidden beast` number, since 6 + 7 + 0 + 6 + 60 + 565 + 1 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 646054250625 + 24606314496 = 803775^2 + 156864^2 .

It is not a de Polignac number, because 670660565121 - 2²⁵ = 670627010689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (670660565129) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37258920276 + ... + 37258920293.

It is an arithmetic number, because the mean of its divisors is an integer number (161455321235).

Almost surely, 2^670660565121 is an apocalyptic number.

It is an amenable number.

670660565121 is a deficient number, since it is larger than the sum of its proper divisors (298071362289).

670660565121 is a wasteful number, since it uses less digits than its factorization.

670660565121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74517840575 (or 74517840572 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 45.

The spelling of 670660565121 in words is "six hundred seventy billion, six hundred sixty million, five hundred sixty-five thousand, one hundred twenty-one".