66680144303 has 16 divisors (see below), whose sum is σ = 69020380800. Its totient is φ = 64377158400.

The previous prime is 66680144299. The next prime is 66680144317. The reversal of 66680144303 is 30344108666.

It is a cyclic number.

It is not a de Polignac number, because 66680144303 - 2² = 66680144299 is a prime.

It is a super-3 number, since 3×66680144303³ (a number of 33 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66680144383) 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, 1635401 + ... + 1675677.

It is an arithmetic number, because the mean of its divisors is an integer number (4313773800).

Almost surely, 2^66680144303 is an apocalyptic number.

66680144303 is a deficient number, since it is larger than the sum of its proper divisors (2340236497).

66680144303 is a wasteful number, since it uses less digits than its factorization.

66680144303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40738.

The product of its (nonzero) digits is 248832, while the sum is 41.

The spelling of 66680144303 in words is "sixty-six billion, six hundred eighty million, one hundred forty-four thousand, three hundred three".