68651 has 6 divisors (see below), whose sum is σ = 75852. Its totient is φ = 61620.

The previous prime is 68639. The next prime is 68659. The reversal of 68651 is 15686.

68651 = 45² + 46² + ... + 66².

It is not a de Polignac number, because 68651 - 2¹⁴ = 52267 is a prime.

It is a Duffinian number.

Its product of digits (1440) is a multiple of the sum of its prime divisors (90).

It is a plaindrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 68651.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 68651.

It is not an unprimeable number, because it can be changed into a prime (68659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 830 + ... + 908.

It is an arithmetic number, because the mean of its divisors is an integer number (12642).

2⁶⁸⁶⁵¹ is an apocalyptic number.

68651 is a deficient number, since it is larger than the sum of its proper divisors (7201).

68651 is an equidigital number, since it uses as much as digits as its factorization.

68651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169 (or 90 counting only the distinct ones).

The product of its digits is 1440, while the sum is 26.

The square root of 68651 is about 262.0133584381. The cubic root of 68651 is about 40.9463903734.

It can be divided in two parts, 686 and 51, that added together give a palindrome (737).

The spelling of 68651 in words is "sixty-eight thousand, six hundred fifty-one".