66509672264637 has 8 divisors (see below), whose sum is σ = 101348072022336. Its totient is φ = 38005527008352.

The previous prime is 66509672264549. The next prime is 66509672264669. The reversal of 66509672264637 is 73646227690566.

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

It is not a de Polignac number, because 66509672264637 - 2¹⁰ = 66509672263613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66509672264137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1583563625328 + ... + 1583563625369.

It is an arithmetic number, because the mean of its divisors is an integer number (12668509002792).

Almost surely, 2^{66509672264637} is an apocalyptic number.

It is an amenable number.

66509672264637 is a deficient number, since it is larger than the sum of its proper divisors (34838399757699).

66509672264637 is a wasteful number, since it uses less digits than its factorization.

66509672264637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3167127250707.

The product of its (nonzero) digits is 823011840, while the sum is 69.

The spelling of 66509672264637 in words is "sixty-six trillion, five hundred nine billion, six hundred seventy-two million, two hundred sixty-four thousand, six hundred thirty-seven".