66668082740 has 48 divisors (see below), whose sum is σ = 168424636800. Its totient is φ = 21654594432.

The previous prime is 66668082731. The next prime is 66668082743. The reversal of 66668082740 is 4728086666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66668082743) 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 15 ways as a sum of consecutive naturals, for example, 12528935 + ... + 12534254.

It is an arithmetic number, because the mean of its divisors is an integer number (3508846600).

Almost surely, 2^66668082740 is an apocalyptic number.

It is an amenable number.

66668082740 is an abundant number, since it is smaller than the sum of its proper divisors (101756554060).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66668082740 is a wasteful number, since it uses less digits than its factorization.

66668082740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25063224 (or 25063222 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 53.

The spelling of 66668082740 in words is "sixty-six billion, six hundred sixty-eight million, eighty-two thousand, seven hundred forty".