68664499446607 has 16 divisors (see below), whose sum is σ = 68855331552480. Its totient is φ = 68473974546432.

The previous prime is 68664499446559. The next prime is 68664499446737. The reversal of 68664499446607 is 70664499446686.

It is a cyclic number.

It is not a de Polignac number, because 68664499446607 - 2¹¹ = 68664499444559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68664499446307) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2317148463 + ... + 2317178095.

It is an arithmetic number, because the mean of its divisors is an integer number (4303458222030).

Almost surely, 2^{68664499446607} is an apocalyptic number.

68664499446607 is a deficient number, since it is larger than the sum of its proper divisors (190832105873).

68664499446607 is a wasteful number, since it uses less digits than its factorization.

68664499446607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34602.

The product of its (nonzero) digits is 9029615616, while the sum is 79.

Adding to 68664499446607 its sum of digits (79), we get a palindrome (68664499446686).

The spelling of 68664499446607 in words is "sixty-eight trillion, six hundred sixty-four billion, four hundred ninety-nine million, four hundred forty-six thousand, six hundred seven".