68386661 has 8 divisors (see below), whose sum is σ = 78208704. Its totient is φ = 58577760.

The previous prime is 68386639. The next prime is 68386663. The reversal of 68386661 is 16668386.

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 68386661 - 2¹⁸ = 68124517 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68386663) 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, 13826 + ... + 18108.

It is an arithmetic number, because the mean of its divisors is an integer number (9776088).

Almost surely, 2^68386661 is an apocalyptic number.

It is an amenable number.

68386661 is a deficient number, since it is larger than the sum of its proper divisors (9822043).

68386661 is a wasteful number, since it uses less digits than its factorization.

68386661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6571.

The product of its digits is 248832, while the sum is 44.

The square root of 68386661 is about 8269.6227846257. The cubic root of 68386661 is about 408.9376841671.

The spelling of 68386661 in words is "sixty-eight million, three hundred eighty-six thousand, six hundred sixty-one".