68041669 has 4 divisors (see below), whose sum is σ = 68059180. Its totient is φ = 68024160.

The previous prime is 68041651. The next prime is 68041681. The reversal of 68041669 is 96614086.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96614086 = 2 ⋅48307043.

It can be written as a sum of positive squares in 2 ways, for example, as 64480900 + 3560769 = 8030^2 + 1887^2 .

It is a cyclic number.

It is not a de Polignac number, because 68041669 - 2⁵ = 68041637 is a prime.

It is a super-2 number, since 2×68041669² = 9259337440611122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68041619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24 + ... + 11665.

It is an arithmetic number, because the mean of its divisors is an integer number (17014795).

Almost surely, 2^68041669 is an apocalyptic number.

It is an amenable number.

68041669 is a deficient number, since it is larger than the sum of its proper divisors (17511).

68041669 is a wasteful number, since it uses less digits than its factorization.

68041669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17510.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 68041669 is about 8248.7374185387. The cubic root of 68041669 is about 408.2488649751.

The spelling of 68041669 in words is "sixty-eight million, forty-one thousand, six hundred sixty-nine".