68667663 has 16 divisors (see below), whose sum is σ = 92607840. Its totient is φ = 45256704.

The previous prime is 68667631. The next prime is 68667707. The reversal of 68667663 is 36676686.

It is a happy number.

It is not a de Polignac number, because 68667663 - 2⁵ = 68667631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68667623) 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 15 ways as a sum of consecutive naturals, for example, 134653 + ... + 135161.

It is an arithmetic number, because the mean of its divisors is an integer number (5787990).

Almost surely, 2^68667663 is an apocalyptic number.

68667663 is a deficient number, since it is larger than the sum of its proper divisors (23940177).

68667663 is a wasteful number, since it uses less digits than its factorization.

68667663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 938.

The product of its digits is 1306368, while the sum is 48.

The square root of 68667663 is about 8286.5953804925. The cubic root of 68667663 is about 409.4970294718.

The spelling of 68667663 in words is "sixty-eight million, six hundred sixty-seven thousand, six hundred sixty-three".