66740148668 has 12 divisors (see below), whose sum is σ = 116838552600. Its totient is φ = 33357705072.

The previous prime is 66740148667. The next prime is 66740148743. The reversal of 66740148668 is 86684104766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66740148667) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 3080171 + ... + 3101762.

It is an arithmetic number, because the mean of its divisors is an integer number (9736546050).

Almost surely, 2^66740148668 is an apocalyptic number.

It is an amenable number.

66740148668 is a deficient number, since it is larger than the sum of its proper divisors (50098403932).

66740148668 is a wasteful number, since it uses less digits than its factorization.

66740148668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6184636 (or 6184634 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 56.

The spelling of 66740148668 in words is "sixty-six billion, seven hundred forty million, one hundred forty-eight thousand, six hundred sixty-eight".