67568689 has 8 divisors (see below), whose sum is σ = 68343912. Its totient is φ = 66796800.

The previous prime is 67568671. The next prime is 67568707. The reversal of 67568689 is 98686576.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (67568671) and next prime (67568707).

It can be written as a sum of positive squares in 4 ways, for example, as 289 + 67568400 = 17^2 + 8220^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 67568689 - 2¹⁵ = 67535921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67568639) 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, 78787 + ... + 79639.

It is an arithmetic number, because the mean of its divisors is an integer number (8542989).

Almost surely, 2^67568689 is an apocalyptic number.

It is an amenable number.

67568689 is a deficient number, since it is larger than the sum of its proper divisors (775223).

67568689 is a wasteful number, since it uses less digits than its factorization.

67568689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1667.

The product of its digits is 4354560, while the sum is 55.

The square root of 67568689 is about 8220.0175790566. The cubic root of 67568689 is about 407.3007072466.

The spelling of 67568689 in words is "sixty-seven million, five hundred sixty-eight thousand, six hundred eighty-nine".