67383661 has 2 divisors, whose sum is σ = 67383662. Its totient is φ = 67383660.

The previous prime is 67383647. The next prime is 67383683. The reversal of 67383661 is 16638376.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46498761 + 20884900 = 6819^2 + 4570^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67383661 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67333661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33691830 + 33691831.

It is an arithmetic number, because the mean of its divisors is an integer number (33691831).

Almost surely, 2^67383661 is an apocalyptic number.

It is an amenable number.

67383661 is a deficient number, since it is larger than the sum of its proper divisors (1).

67383661 is an equidigital number, since it uses as much as digits as its factorization.

67383661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 40.

The square root of 67383661 is about 8208.7551431383. The cubic root of 67383661 is about 406.9285875024.

The spelling of 67383661 in words is "sixty-seven million, three hundred eighty-three thousand, six hundred sixty-one".