66025997788 has 12 divisors (see below), whose sum is σ = 120569213520. Its totient is φ = 31577651072.

The previous prime is 66025997759. The next prime is 66025997797. The reversal of 66025997788 is 88779952066.

It is a congruent number.

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, 358836853 + ... + 358837036.

It is an arithmetic number, because the mean of its divisors is an integer number (10047434460).

Almost surely, 2^66025997788 is an apocalyptic number.

It is an amenable number.

66025997788 is a deficient number, since it is larger than the sum of its proper divisors (54543215732).

66025997788 is a wasteful number, since it uses less digits than its factorization.

66025997788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 717673916 (or 717673914 counting only the distinct ones).

The product of its (nonzero) digits is 91445760, while the sum is 67.

The spelling of 66025997788 in words is "sixty-six billion, twenty-five million, nine hundred ninety-seven thousand, seven hundred eighty-eight".