66155617325 has 12 divisors (see below), whose sum is σ = 93751960800. Its totient is φ = 45363851760.

The previous prime is 66155617271. The next prime is 66155617361. The reversal of 66155617325 is 52371655166.

It is not a de Polignac number, because 66155617325 - 2⁸ = 66155617069 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66155617325.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 189015875 + ... + 189016224.

It is an arithmetic number, because the mean of its divisors is an integer number (7812663400).

Almost surely, 2^66155617325 is an apocalyptic number.

It is an amenable number.

66155617325 is a deficient number, since it is larger than the sum of its proper divisors (27596343475).

66155617325 is a wasteful number, since it uses less digits than its factorization.

66155617325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378032116 (or 378032111 counting only the distinct ones).

The product of its digits is 1134000, while the sum is 47.

The spelling of 66155617325 in words is "sixty-six billion, one hundred fifty-five million, six hundred seventeen thousand, three hundred twenty-five".