68205790606665 has 32 divisors (see below), whose sum is σ = 109395277595136. Its totient is φ = 36287770561280.

The previous prime is 68205790606649. The next prime is 68205790606669. The reversal of 68205790606665 is 56660609750286.

It is not a de Polignac number, because 68205790606665 - 2⁴ = 68205790606649 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68205790606596 and 68205790606605.

It is not an unprimeable number, because it can be changed into a prime (68205790606669) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54966019 + ... + 56193191.

It is an arithmetic number, because the mean of its divisors is an integer number (3418602424848).

Almost surely, 2^{68205790606665} is an apocalyptic number.

It is an amenable number.

68205790606665 is a deficient number, since it is larger than the sum of its proper divisors (41189486988471).

68205790606665 is a wasteful number, since it uses less digits than its factorization.

68205790606665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1236209.

The product of its (nonzero) digits is 195955200, while the sum is 66.

The spelling of 68205790606665 in words is "sixty-eight trillion, two hundred five billion, seven hundred ninety million, six hundred six thousand, six hundred sixty-five".