68665893 has 8 divisors (see below), whose sum is σ = 91740000. Its totient is φ = 45684528.

The previous prime is 68665889. The next prime is 68665897. The reversal of 68665893 is 39856686.

It is an interprime number because it is at equal distance from previous prime (68665889) and next prime (68665897).

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

It is not a de Polignac number, because 68665893 - 2² = 68665889 is a prime.

It is a super-2 number, since 2×68665893² = 9430009722974898, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68665897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21438 + ... + 24431.

It is an arithmetic number, because the mean of its divisors is an integer number (11467500).

Almost surely, 2^68665893 is an apocalyptic number.

It is an amenable number.

68665893 is a deficient number, since it is larger than the sum of its proper divisors (23074107).

68665893 is a wasteful number, since it uses less digits than its factorization.

68665893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46371.

The product of its digits is 1866240, while the sum is 51.

The square root of 68665893 is about 8286.4885808164. The cubic root of 68665893 is about 409.4935109987.

The spelling of 68665893 in words is "sixty-eight million, six hundred sixty-five thousand, eight hundred ninety-three".