66185973458 has 8 divisors (see below), whose sum is σ = 108304320240. Its totient is φ = 30084533380.

The previous prime is 66185973449. The next prime is 66185973473. The reversal of 66185973458 is 85437958166.

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

It is a self number, because there is not a number n which added to its sum of digits gives 66185973458.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1504226648 + ... + 1504226691.

It is an arithmetic number, because the mean of its divisors is an integer number (13538040030).

Almost surely, 2^66185973458 is an apocalyptic number.

66185973458 is a deficient number, since it is larger than the sum of its proper divisors (42118346782).

66185973458 is a wasteful number, since it uses less digits than its factorization.

66185973458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3008453352.

The product of its digits is 43545600, while the sum is 62.

The spelling of 66185973458 in words is "sixty-six billion, one hundred eighty-five million, nine hundred seventy-three thousand, four hundred fifty-eight".