68165137 has 8 divisors (see below), whose sum is σ = 70969256. Its totient is φ = 65411712.

The previous prime is 68165131. The next prime is 68165173. The reversal of 68165137 is 73156186.

It can be written as a sum of positive squares in 4 ways, for example, as 34999056 + 33166081 = 5916^2 + 5759^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68165137 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a junction number, because it is equal to n+sod(n) for n = 68165096 and 68165105.

It is not an unprimeable number, because it can be changed into a prime (68165131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9918 + ... + 15319.

It is an arithmetic number, because the mean of its divisors is an integer number (8871157).

Almost surely, 2^68165137 is an apocalyptic number.

It is an amenable number.

68165137 is a deficient number, since it is larger than the sum of its proper divisors (2804119).

68165137 is a wasteful number, since it uses less digits than its factorization.

68165137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25347.

The product of its digits is 30240, while the sum is 37.

The square root of 68165137 is about 8256.2180809375. The cubic root of 68165137 is about 408.4956510681.

The spelling of 68165137 in words is "sixty-eight million, one hundred sixty-five thousand, one hundred thirty-seven".