68658081 has 4 divisors (see below), whose sum is σ = 91544112. Its totient is φ = 45772052.

The previous prime is 68658041. The next prime is 68658089. The reversal of 68658081 is 18085686.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 68658081 - 2⁹ = 68657569 is a prime.

It is a super-2 number, since 2×68658081² = 9427864173205122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68658089) 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, 11443011 + ... + 11443016.

It is an arithmetic number, because the mean of its divisors is an integer number (22886028).

Almost surely, 2^68658081 is an apocalyptic number.

It is an amenable number.

68658081 is a deficient number, since it is larger than the sum of its proper divisors (22886031).

68658081 is a wasteful number, since it uses less digits than its factorization.

68658081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22886030.

The product of its (nonzero) digits is 92160, while the sum is 42.

The square root of 68658081 is about 8286.0171976650. The cubic root of 68658081 is about 409.4779812867.

The spelling of 68658081 in words is "sixty-eight million, six hundred fifty-eight thousand, eighty-one".