67322161665 has 64 divisors (see below), whose sum is σ = 130696001280. Its totient is φ = 32608097280.

The previous prime is 67322161579. The next prime is 67322161727. The reversal of 67322161665 is 56616122376.

67322161665 is a `hidden beast` number, since 6 + 7 + 3 + 2 + 21 + 616 + 6 + 5 = 666.

67322161665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 67322161665 - 2⁸ = 67322161409 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 67322161665.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1481929 + ... + 1526681.

It is an arithmetic number, because the mean of its divisors is an integer number (2042125020).

Almost surely, 2^67322161665 is an apocalyptic number.

It is an amenable number.

67322161665 is a deficient number, since it is larger than the sum of its proper divisors (63373839615).

67322161665 is a wasteful number, since it uses less digits than its factorization.

67322161665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45791 (or 45785 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The spelling of 67322161665 in words is "sixty-seven billion, three hundred twenty-two million, one hundred sixty-one thousand, six hundred sixty-five".