68118661 has 12 divisors (see below), whose sum is σ = 74470752. Its totient is φ = 62274576.

The previous prime is 68118647. The next prime is 68118679. The reversal of 68118661 is 16681186.

It is a happy number.

It is not a de Polignac number, because 68118661 - 2¹¹ = 68116613 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68118661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68115661) 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, 16200 + ... + 19966.

It is an arithmetic number, because the mean of its divisors is an integer number (6205896).

Almost surely, 2^68118661 is an apocalyptic number.

It is an amenable number.

68118661 is a deficient number, since it is larger than the sum of its proper divisors (6352091).

68118661 is a wasteful number, since it uses less digits than its factorization.

68118661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3900 (or 3887 counting only the distinct ones).

The product of its digits is 13824, while the sum is 37.

The square root of 68118661 is about 8253.4029951287. The cubic root of 68118661 is about 408.4027904986.

The spelling of 68118661 in words is "sixty-eight million, one hundred eighteen thousand, six hundred sixty-one".