67066817 has 2 divisors, whose sum is σ = 67066818. Its totient is φ = 67066816.

The previous prime is 67066807. The next prime is 67066847. The reversal of 67066817 is 71866076.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51825601 + 15241216 = 7199^2 + 3904^2 .

It is a cyclic number.

It is not a de Polignac number, because 67066817 - 2¹⁴ = 67050433 is a prime.

It is a super-2 number, since 2×67066817² = 8995915885022978, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (67066807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33533408 + 33533409.

It is an arithmetic number, because the mean of its divisors is an integer number (33533409).

Almost surely, 2^67066817 is an apocalyptic number.

It is an amenable number.

67066817 is a deficient number, since it is larger than the sum of its proper divisors (1).

67066817 is an equidigital number, since it uses as much as digits as its factorization.

67066817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 67066817 is about 8189.4332526738. The cubic root of 67066817 is about 406.2897803412.

The spelling of 67066817 in words is "sixty-seven million, sixty-six thousand, eight hundred seventeen".