68667129 has 16 divisors (see below), whose sum is σ = 101888640. Its totient is φ = 45706320.

The previous prime is 68667103. The next prime is 68667211. The reversal of 68667129 is 92176686.

It is not a de Polignac number, because 68667129 - 2¹² = 68663033 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (68667229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19924 + ... + 23114.

It is an arithmetic number, because the mean of its divisors is an integer number (6368040).

Almost surely, 2^68667129 is an apocalyptic number.

It is an amenable number.

68667129 is a deficient number, since it is larger than the sum of its proper divisors (33221511).

68667129 is a wasteful number, since it uses less digits than its factorization.

68667129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3997 (or 3991 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 68667129 is about 8286.5631597183. The cubic root of 68667129 is about 409.4959679728.

The spelling of 68667129 in words is "sixty-eight million, six hundred sixty-seven thousand, one hundred twenty-nine".