66725653674 has 8 divisors (see below), whose sum is σ = 133451307360. Its totient is φ = 22241884556.

The previous prime is 66725653639. The next prime is 66725653691. The reversal of 66725653674 is 47635652766.

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

66725653674 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5560471134 + ... + 5560471145.

It is an arithmetic number, because the mean of its divisors is an integer number (16681413420).

Almost surely, 2^66725653674 is an apocalyptic number.

66725653674 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.

66725653674 is a wasteful number, since it uses less digits than its factorization.

66725653674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11120942284.

The product of its digits is 38102400, while the sum is 57.

The spelling of 66725653674 in words is "sixty-six billion, seven hundred twenty-five million, six hundred fifty-three thousand, six hundred seventy-four".