68669865 has 24 divisors (see below), whose sum is σ = 129849408. Its totient is φ = 33294240.

The previous prime is 68669863. The next prime is 68669869. The reversal of 68669865 is 56896686.

It is not a de Polignac number, because 68669865 - 2¹ = 68669863 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68669863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 68869 + ... + 69858.

It is an arithmetic number, because the mean of its divisors is an integer number (5410392).

Almost surely, 2^68669865 is an apocalyptic number.

It is an amenable number.

68669865 is a deficient number, since it is larger than the sum of its proper divisors (61179543).

68669865 is a wasteful number, since it uses less digits than its factorization.

68669865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138749 (or 138746 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 54.

The square root of 68669865 is about 8286.7282446090. The cubic root of 68669865 is about 409.5014066065.

The spelling of 68669865 in words is "sixty-eight million, six hundred sixty-nine thousand, eight hundred sixty-five".