66403369688 has 16 divisors (see below), whose sum is σ = 126259929360. Its totient is φ = 32734055200.

The previous prime is 66403369687. The next prime is 66403369709. The reversal of 66403369688 is 88696330466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66403369687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58453103 + ... + 58454238.

It is an arithmetic number, because the mean of its divisors is an integer number (7891245585).

Almost surely, 2^66403369688 is an apocalyptic number.

It is an amenable number.

66403369688 is a deficient number, since it is larger than the sum of its proper divisors (59856559672).

66403369688 is a wasteful number, since it uses less digits than its factorization.

66403369688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116907418 (or 116907414 counting only the distinct ones).

The product of its (nonzero) digits is 26873856, while the sum is 59.

The spelling of 66403369688 in words is "sixty-six billion, four hundred three million, three hundred sixty-nine thousand, six hundred eighty-eight".