66501616326 has 8 divisors (see below), whose sum is σ = 133003232664. Its totient is φ = 22167205440.

The previous prime is 66501616309. The next prime is 66501616367. The reversal of 66501616326 is 62361610566.

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

66501616326 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5541801355 + ... + 5541801366.

It is an arithmetic number, because the mean of its divisors is an integer number (16625404083).

Almost surely, 2^66501616326 is an apocalyptic number.

66501616326 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66501616326 is a wasteful number, since it uses less digits than its factorization.

66501616326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11083602726.

The product of its (nonzero) digits is 233280, while the sum is 42.

The spelling of 66501616326 in words is "sixty-six billion, five hundred one million, six hundred sixteen thousand, three hundred twenty-six".