67816069 has 2 divisors, whose sum is σ = 67816070. Its totient is φ = 67816068.

The previous prime is 67816061. The next prime is 67816081. The reversal of 67816069 is 96061876.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41447844 + 26368225 = 6438^2 + 5135^2 .

It is a cyclic number.

It is not a de Polignac number, because 67816069 - 2³ = 67816061 is a prime.

It is a super-2 number, since 2×67816069² = 9198038429225522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67816061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33908034 + 33908035.

It is an arithmetic number, because the mean of its divisors is an integer number (33908035).

Almost surely, 2^67816069 is an apocalyptic number.

It is an amenable number.

67816069 is a deficient number, since it is larger than the sum of its proper divisors (1).

67816069 is an equidigital number, since it uses as much as digits as its factorization.

67816069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 67816069 is about 8235.0512445279. The cubic root of 67816069 is about 407.7971666573.

The spelling of 67816069 in words is "sixty-seven million, eight hundred sixteen thousand, sixty-nine".