66501642873 has 8 divisors (see below), whose sum is σ = 93335639200. Its totient is φ = 42001037568.

The previous prime is 66501642829. The next prime is 66501642877. The reversal of 66501642873 is 37824610566.

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

It is a de Polignac number, because none of the positive numbers 2^k-66501642873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66501642877) 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 7 ways as a sum of consecutive naturals, for example, 583347688 + ... + 583347801.

It is an arithmetic number, because the mean of its divisors is an integer number (11666954900).

Almost surely, 2^66501642873 is an apocalyptic number.

It is an amenable number.

66501642873 is a deficient number, since it is larger than the sum of its proper divisors (26833996327).

66501642873 is a wasteful number, since it uses less digits than its factorization.

66501642873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1166695511.

The product of its (nonzero) digits is 1451520, while the sum is 48.

The spelling of 66501642873 in words is "sixty-six billion, five hundred one million, six hundred forty-two thousand, eight hundred seventy-three".