68855663 has 2 divisors, whose sum is σ = 68855664. Its totient is φ = 68855662.

The previous prime is 68855659. The next prime is 68855701. The reversal of 68855663 is 36655886.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68855663 - 2² = 68855659 is a prime.

It is a super-2 number, since 2×68855663² = 9482204654339138, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68855623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34427831 + 34427832.

It is an arithmetic number, because the mean of its divisors is an integer number (34427832).

Almost surely, 2^68855663 is an apocalyptic number.

68855663 is a deficient number, since it is larger than the sum of its proper divisors (1).

68855663 is an equidigital number, since it uses as much as digits as its factorization.

68855663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1036800, while the sum is 47.

The square root of 68855663 is about 8297.9312482088. The cubic root of 68855663 is about 409.8703992518.

The spelling of 68855663 in words is "sixty-eight million, eight hundred fifty-five thousand, six hundred sixty-three".