68377721 has 8 divisors (see below), whose sum is σ = 70184160. Its totient is φ = 66594528.

The previous prime is 68377717. The next prime is 68377741. The reversal of 68377721 is 12777386.

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

It is a cyclic number.

It is not a de Polignac number, because 68377721 - 2² = 68377717 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68377741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 230 + ... + 11696.

It is an arithmetic number, because the mean of its divisors is an integer number (8773020).

Almost surely, 2^68377721 is an apocalyptic number.

It is an amenable number.

68377721 is a deficient number, since it is larger than the sum of its proper divisors (1806439).

68377721 is a wasteful number, since it uses less digits than its factorization.

68377721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11623.

The product of its digits is 98784, while the sum is 41.

The square root of 68377721 is about 8269.0822344442. The cubic root of 68377721 is about 408.9198636245.

The spelling of 68377721 in words is "sixty-eight million, three hundred seventy-seven thousand, seven hundred twenty-one".