68775581 has 8 divisors (see below), whose sum is σ = 78685824. Its totient is φ = 58886640.

The previous prime is 68775541. The next prime is 68775607. The reversal of 68775581 is 18557786.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 68775581 - 2¹⁰ = 68774557 is a prime.

It is a super-3 number, since 3×68775581³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68775541) 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, 2336 + ... + 11958.

It is an arithmetic number, because the mean of its divisors is an integer number (9835728).

Almost surely, 2^68775581 is an apocalyptic number.

It is an amenable number.

68775581 is a deficient number, since it is larger than the sum of its proper divisors (9910243).

68775581 is a wasteful number, since it uses less digits than its factorization.

68775581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10651.

The product of its digits is 470400, while the sum is 47.

The square root of 68775581 is about 8293.1044247616. The cubic root of 68775581 is about 409.7114388359.

The spelling of 68775581 in words is "sixty-eight million, seven hundred seventy-five thousand, five hundred eighty-one".