68158718 has 4 divisors (see below), whose sum is σ = 102238080. Its totient is φ = 34079358.

The previous prime is 68158711. The next prime is 68158721. The reversal of 68158718 is 81785186.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×68158718² = 9291221678807048, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68158711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17039678 + ... + 17039681.

It is an arithmetic number, because the mean of its divisors is an integer number (25559520).

Almost surely, 2^68158718 is an apocalyptic number.

68158718 is a deficient number, since it is larger than the sum of its proper divisors (34079362).

68158718 is a wasteful number, since it uses less digits than its factorization.

68158718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34079361.

The product of its digits is 107520, while the sum is 44.

The square root of 68158718 is about 8255.8293344763. The cubic root of 68158718 is about 408.4828282087.

The spelling of 68158718 in words is "sixty-eight million, one hundred fifty-eight thousand, seven hundred eighteen".