68166645 has 8 divisors (see below), whose sum is σ = 109066656. Its totient is φ = 36355536.

The previous prime is 68166643. The next prime is 68166647. The reversal of 68166645 is 54666186.

It is an interprime number because it is at equal distance from previous prime (68166643) and next prime (68166647).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 68166645 - 2¹ = 68166643 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 68166597 and 68166606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68166643) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2272207 + ... + 2272236.

It is an arithmetic number, because the mean of its divisors is an integer number (13633332).

Almost surely, 2^68166645 is an apocalyptic number.

It is an amenable number.

68166645 is a deficient number, since it is larger than the sum of its proper divisors (40900011).

68166645 is a wasteful number, since it uses less digits than its factorization.

68166645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4544451.

The product of its digits is 207360, while the sum is 42.

The square root of 68166645 is about 8256.3094055395. The cubic root of 68166645 is about 408.4986633943.

The spelling of 68166645 in words is "sixty-eight million, one hundred sixty-six thousand, six hundred forty-five".