68716669 has 12 divisors (see below), whose sum is σ = 84638844. Its totient is φ = 55434624.

The previous prime is 68716619. The next prime is 68716691. The reversal of 68716669 is 96661786.

It can be written as a sum of positive squares in 2 ways, for example, as 22992025 + 45724644 = 4795^2 + 6762^2 .

It is not a de Polignac number, because 68716669 - 2¹⁷ = 68585597 is a prime.

It is a super-3 number, since 3×68716669³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68716619) 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 11 ways as a sum of consecutive naturals, for example, 40414 + ... + 42079.

It is an arithmetic number, because the mean of its divisors is an integer number (7053237).

Almost surely, 2^68716669 is an apocalyptic number.

It is an amenable number.

68716669 is a deficient number, since it is larger than the sum of its proper divisors (15922175).

68716669 is a wasteful number, since it uses less digits than its factorization.

68716669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82524 (or 82517 counting only the distinct ones).

The product of its digits is 653184, while the sum is 49.

The square root of 68716669 is about 8289.5517972928. The cubic root of 68716669 is about 409.5944214538.

The spelling of 68716669 in words is "sixty-eight million, seven hundred sixteen thousand, six hundred sixty-nine".