72066160722065 has 8 divisors (see below), whose sum is σ = 86487742778280. Its totient is φ = 57647361969792.

The previous prime is 72066160722047. The next prime is 72066160722067. The reversal of 72066160722065 is 56022706166027.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 391129729 + 72065769592336 = 19777^2 + 8489156^2 .

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 72066160722065 - 2¹⁰ = 72066160721041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72066160722067) 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, 695769020 + ... + 695872589.

It is an arithmetic number, because the mean of its divisors is an integer number (10810967847285).

Almost surely, 2^{72066160722065} is an apocalyptic number.

It is an amenable number.

72066160722065 is a deficient number, since it is larger than the sum of its proper divisors (14421582056215).

72066160722065 is a wasteful number, since it uses less digits than its factorization.

72066160722065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1391651971.

The product of its (nonzero) digits is 2540160, while the sum is 50.

The spelling of 72066160722065 in words is "seventy-two trillion, sixty-six billion, one hundred sixty million, seven hundred twenty-two thousand, sixty-five".