68665868807 has 4 divisors (see below), whose sum is σ = 68667157056. Its totient is φ = 68664580560.

The previous prime is 68665868797. The next prime is 68665868911. The reversal of 68665868807 is 70886856686.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 68665868807 - 2¹² = 68665864711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68665868707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 560558 + ... + 671979.

It is an arithmetic number, because the mean of its divisors is an integer number (17166789264).

Almost surely, 2^68665868807 is an apocalyptic number.

68665868807 is a deficient number, since it is larger than the sum of its proper divisors (1288249).

68665868807 is a wasteful number, since it uses less digits than its factorization.

68665868807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1288248.

The product of its (nonzero) digits is 185794560, while the sum is 68.

The spelling of 68665868807 in words is "sixty-eight billion, six hundred sixty-five million, eight hundred sixty-eight thousand, eight hundred seven".