67636161 has 8 divisors (see below), whose sum is σ = 100201760. Its totient is φ = 45090756.

The previous prime is 67636159. The next prime is 67636187. The reversal of 67636161 is 16163676.

67636161 is a `hidden beast` number, since 6 + 7 + 636 + 16 + 1 = 666.

It is not a de Polignac number, because 67636161 - 2¹ = 67636159 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (67616161) 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, 1252495 + ... + 1252548.

It is an arithmetic number, because the mean of its divisors is an integer number (12525220).

Almost surely, 2^67636161 is an apocalyptic number.

It is an amenable number.

67636161 is a deficient number, since it is larger than the sum of its proper divisors (32565599).

67636161 is a wasteful number, since it uses less digits than its factorization.

67636161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2505052 (or 2505046 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 67636161 is about 8224.1206824803. The cubic root of 67636161 is about 407.4362347690.

The spelling of 67636161 in words is "sixty-seven million, six hundred thirty-six thousand, one hundred sixty-one".