66651104125 has 16 divisors (see below), whose sum is σ = 83553619968. Its totient is φ = 53081754000.

The previous prime is 66651104119. The next prime is 66651104137. The reversal of 66651104125 is 52140115666.

It is a de Polignac number, because none of the positive numbers 2^k-66651104125 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1167661 + ... + 1223410.

It is an arithmetic number, because the mean of its divisors is an integer number (5222101248).

Almost surely, 2^66651104125 is an apocalyptic number.

It is an amenable number.

66651104125 is a deficient number, since it is larger than the sum of its proper divisors (16902515843).

66651104125 is a wasteful number, since it uses less digits than its factorization.

66651104125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2391309 (or 2391299 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 37.

The spelling of 66651104125 in words is "sixty-six billion, six hundred fifty-one million, one hundred four thousand, one hundred twenty-five".