68026721 has 8 divisors (see below), whose sum is σ = 80425920. Its totient is φ = 56297808.

The previous prime is 68026703. The next prime is 68026759. The reversal of 68026721 is 12762086.

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

It is not a de Polignac number, because 68026721 - 2⁶ = 68026657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68086721) 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, 167351 + ... + 167756.

It is an arithmetic number, because the mean of its divisors is an integer number (10053240).

Almost surely, 2^68026721 is an apocalyptic number.

It is an amenable number.

68026721 is a deficient number, since it is larger than the sum of its proper divisors (12399199).

68026721 is a wasteful number, since it uses less digits than its factorization.

68026721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335143.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 68026721 is about 8247.8312907091. The cubic root of 68026721 is about 408.2189668697.

The spelling of 68026721 in words is "sixty-eight million, twenty-six thousand, seven hundred twenty-one".