66658733012 has 6 divisors (see below), whose sum is σ = 116652782778. Its totient is φ = 33329366504.

The previous prime is 66658732967. The next prime is 66658733027. The reversal of 66658733012 is 21033785666.

It can be written as a sum of positive squares in only one way, i.e., 57118132036 + 9540600976 = 238994^2 + 97676^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8332341623 + ... + 8332341630.

It is an arithmetic number, because the mean of its divisors is an integer number (19442130463).

Almost surely, 2^66658733012 is an apocalyptic number.

It is an amenable number.

66658733012 is a deficient number, since it is larger than the sum of its proper divisors (49994049766).

66658733012 is a wasteful number, since it uses less digits than its factorization.

66658733012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16664683257 (or 16664683255 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 47.

The spelling of 66658733012 in words is "sixty-six billion, six hundred fifty-eight million, seven hundred thirty-three thousand, twelve".