68611918 has 8 divisors (see below), whose sum is σ = 105311448. Its totient is φ = 33508104.

The previous prime is 68611913. The next prime is 68611927. The reversal of 68611918 is 81911686.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68611913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 398821 + ... + 398992.

It is an arithmetic number, because the mean of its divisors is an integer number (13163931).

Almost surely, 2^68611918 is an apocalyptic number.

68611918 is a deficient number, since it is larger than the sum of its proper divisors (36699530).

68611918 is a wasteful number, since it uses less digits than its factorization.

68611918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797858.

The product of its digits is 20736, while the sum is 40.

The square root of 68611918 is about 8283.2311328370. The cubic root of 68611918 is about 409.3861884012.

The spelling of 68611918 in words is "sixty-eight million, six hundred eleven thousand, nine hundred eighteen".