67772161 has 2 divisors, whose sum is σ = 67772162. Its totient is φ = 67772160.

The previous prime is 67772147. The next prime is 67772209. The reversal of 67772161 is 16127776.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64899136 + 2873025 = 8056^2 + 1695^2 .

It is a cyclic number.

It is not a de Polignac number, because 67772161 - 2¹¹ = 67770113 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 67772161.

It is not a weakly prime, because it can be changed into another prime (67772461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33886080 + 33886081.

It is an arithmetic number, because the mean of its divisors is an integer number (33886081).

Almost surely, 2^67772161 is an apocalyptic number.

It is an amenable number.

67772161 is a deficient number, since it is larger than the sum of its proper divisors (1).

67772161 is an equidigital number, since it uses as much as digits as its factorization.

67772161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24696, while the sum is 37.

The square root of 67772161 is about 8232.3848913908. The cubic root of 67772161 is about 407.7091372565.

The spelling of 67772161 in words is "sixty-seven million, seven hundred seventy-two thousand, one hundred sixty-one".