68078165 has 4 divisors (see below), whose sum is σ = 81693804. Its totient is φ = 54462528.

The previous prime is 68078161. The next prime is 68078191. The reversal of 68078165 is 56187086.

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

It can be written as a sum of positive squares in 2 ways, for example, as 15689521 + 52388644 = 3961^2 + 7238^2 .

It is a cyclic number.

It is not a de Polignac number, because 68078165 - 2² = 68078161 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 (68078161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6807812 + ... + 6807821.

It is an arithmetic number, because the mean of its divisors is an integer number (20423451).

Almost surely, 2^68078165 is an apocalyptic number.

It is an amenable number.

68078165 is a deficient number, since it is larger than the sum of its proper divisors (13615639).

68078165 is a wasteful number, since it uses less digits than its factorization.

68078165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13615638.

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 68078165 is about 8250.9493393185. The cubic root of 68078165 is about 408.3218437232.

The spelling of 68078165 in words is "sixty-eight million, seventy-eight thousand, one hundred sixty-five".