68616659 has 4 divisors (see below), whose sum is σ = 71600016. Its totient is φ = 65633304.

The previous prime is 68616589. The next prime is 68616679. The reversal of 68616659 is 95661686.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68616659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68616679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1491644 + ... + 1491689.

It is an arithmetic number, because the mean of its divisors is an integer number (17900004).

Almost surely, 2^68616659 is an apocalyptic number.

68616659 is a deficient number, since it is larger than the sum of its proper divisors (2983357).

68616659 is a wasteful number, since it uses less digits than its factorization.

68616659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2983356.

The product of its digits is 466560, while the sum is 47.

The square root of 68616659 is about 8283.5173084868. The cubic root of 68616659 is about 409.3956175464.

The spelling of 68616659 in words is "sixty-eight million, six hundred sixteen thousand, six hundred fifty-nine".