68533342661 has 16 divisors (see below), whose sum is σ = 81154224000. Its totient is φ = 56657635008.

The previous prime is 68533342639. The next prime is 68533342679. The reversal of 68533342661 is 16624333586.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68533342661 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 (68533342601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1543586 + ... + 1587363.

It is an arithmetic number, because the mean of its divisors is an integer number (5072139000).

Almost surely, 2^68533342661 is an apocalyptic number.

It is an amenable number.

68533342661 is a deficient number, since it is larger than the sum of its proper divisors (12620881339).

68533342661 is a wasteful number, since it uses less digits than its factorization.

68533342661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3131068.

The product of its digits is 1866240, while the sum is 47.

The spelling of 68533342661 in words is "sixty-eight billion, five hundred thirty-three million, three hundred forty-two thousand, six hundred sixty-one".