68665582555 has 16 divisors (see below), whose sum is σ = 87334542144. Its totient is φ = 51648486400.

The previous prime is 68665582549. The next prime is 68665582571. The reversal of 68665582555 is 55528556686.

It is a happy number.

It is not a de Polignac number, because 68665582555 - 2¹³ = 68665574363 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68665582493 and 68665582502.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 327346 + ... + 494455.

It is an arithmetic number, because the mean of its divisors is an integer number (5458408884).

Almost surely, 2^68665582555 is an apocalyptic number.

68665582555 is a deficient number, since it is larger than the sum of its proper divisors (18668959589).

68665582555 is a wasteful number, since it uses less digits than its factorization.

68665582555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 822806.

The product of its digits is 86400000, while the sum is 61.

The spelling of 68665582555 in words is "sixty-eight billion, six hundred sixty-five million, five hundred eighty-two thousand, five hundred fifty-five".