66667128003 has 40 divisors (see below), whose sum is σ = 114284805888. Its totient is φ = 38095422984.

The previous prime is 66667128001. The next prime is 66667128019. The reversal of 66667128003 is 30082176666.

It is not a de Polignac number, because 66667128003 - 2¹ = 66667128001 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66667128003.

It is not an unprimeable number, because it can be changed into a prime (66667128001) 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 39 ways as a sum of consecutive naturals, for example, 104151 + ... + 379712.

Almost surely, 2^66667128003 is an apocalyptic number.

66667128003 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

66667128003 is a deficient number, since it is larger than the sum of its proper divisors (47617677885).

66667128003 is an frugal number, since it uses more digits than its factorization.

66667128003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483897 (or 483873 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The spelling of 66667128003 in words is "sixty-six billion, six hundred sixty-seven million, one hundred twenty-eight thousand, three".