68665719 has 4 divisors (see below), whose sum is σ = 91554296. Its totient is φ = 45777144.

The previous prime is 68665717. The next prime is 68665721. The reversal of 68665719 is 91756686.

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

It is an interprime number because it is at equal distance from previous prime (68665717) and next prime (68665721).

It is not a de Polignac number, because 68665719 - 2¹ = 68665717 is a prime.

It is a super-2 number, since 2×68665719² = 9429961931573922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68665717) 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, 11444284 + ... + 11444289.

It is an arithmetic number, because the mean of its divisors is an integer number (22888574).

Almost surely, 2^68665719 is an apocalyptic number.

68665719 is a deficient number, since it is larger than the sum of its proper divisors (22888577).

68665719 is a wasteful number, since it uses less digits than its factorization.

68665719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22888576.

The product of its digits is 544320, while the sum is 48.

The square root of 68665719 is about 8286.4780817908. The cubic root of 68665719 is about 409.4931651117.

The spelling of 68665719 in words is "sixty-eight million, six hundred sixty-five thousand, seven hundred nineteen".