68664499446687 has 8 divisors (see below), whose sum is σ = 92012729577600. Its totient is φ = 45546301140120.

The previous prime is 68664499446559. The next prime is 68664499446737. The reversal of 68664499446687 is 78664499446686.

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

It is not a de Polignac number, because 68664499446687 - 2⁷ = 68664499446559 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68664499446187) 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, 57507955389 + ... + 57507956582.

It is an arithmetic number, because the mean of its divisors is an integer number (11501591197200).

Almost surely, 2^{68664499446687} is an apocalyptic number.

68664499446687 is a deficient number, since it is larger than the sum of its proper divisors (23348230130913).

68664499446687 is a wasteful number, since it uses less digits than its factorization.

68664499446687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115015912173.

The product of its digits is 72236924928, while the sum is 87.

Subtracting 68664499446687 from its reverse (78664499446686), we obtain a palindrome (9999999999999).

The spelling of 68664499446687 in words is "sixty-eight trillion, six hundred sixty-four billion, four hundred ninety-nine million, four hundred forty-six thousand, six hundred eighty-seven".