68000666621 has 8 divisors (see below), whose sum is σ = 74323309824. Its totient is φ = 61936090560.

The previous prime is 68000666611. The next prime is 68000666659. The reversal of 68000666621 is 12666600086.

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

It is a cyclic number.

It is not a de Polignac number, because 68000666621 - 2¹⁰ = 68000665597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68000666611) 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, 64516235 + ... + 64517288.

It is an arithmetic number, because the mean of its divisors is an integer number (9290413728).

Almost surely, 2^68000666621 is an apocalyptic number.

It is an amenable number.

68000666621 is a deficient number, since it is larger than the sum of its proper divisors (6322643203).

68000666621 is a wasteful number, since it uses less digits than its factorization.

68000666621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129033571.

The product of its (nonzero) digits is 124416, while the sum is 41.

The spelling of 68000666621 in words is "sixty-eight billion, six hundred sixty-six thousand, six hundred twenty-one".