68563665 has 24 divisors (see below), whose sum is σ = 123247488. Its totient is φ = 36566640.

The previous prime is 68563657. The next prime is 68563673. The reversal of 68563665 is 56636586.

68563665 is a `hidden beast` number, since 6 + 8 + 5 + 636 + 6 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (68563657) and next prime (68563673).

It is not a de Polignac number, because 68563665 - 2³ = 68563657 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 68563665.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 27001 + ... + 29430.

It is an arithmetic number, because the mean of its divisors is an integer number (5135312).

Almost surely, 2^68563665 is an apocalyptic number.

It is an amenable number.

68563665 is a deficient number, since it is larger than the sum of its proper divisors (54683823).

68563665 is an equidigital number, since it uses as much as digits as its factorization.

68563665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56451 (or 56439 counting only the distinct ones).

The product of its digits is 777600, while the sum is 45.

The square root of 68563665 is about 8280.3179286788. The cubic root of 68563665 is about 409.2901956301.

The spelling of 68563665 in words is "sixty-eight million, five hundred sixty-three thousand, six hundred sixty-five".