68466990637 has 16 divisors (see below), whose sum is σ = 72253008000. Its totient is φ = 64699452864.

The previous prime is 68466990611. The next prime is 68466990649. The reversal of 68466990637 is 73609966486.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68466990637 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 (68466990667) 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, 14937048 + ... + 14941630.

It is an arithmetic number, because the mean of its divisors is an integer number (4515813000).

Almost surely, 2^68466990637 is an apocalyptic number.

It is an amenable number.

68466990637 is a deficient number, since it is larger than the sum of its proper divisors (3786017363).

68466990637 is a wasteful number, since it uses less digits than its factorization.

68466990637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6420.

The product of its (nonzero) digits is 70543872, while the sum is 64.

The spelling of 68466990637 in words is "sixty-eight billion, four hundred sixty-six million, nine hundred ninety thousand, six hundred thirty-seven".