66880252019 has 16 divisors (see below), whose sum is σ = 78315847680. Its totient is φ = 55915583040.

The previous prime is 66880252001. The next prime is 66880252063. The reversal of 66880252019 is 91025208866.

It is a cyclic number.

It is not a de Polignac number, because 66880252019 - 2¹² = 66880247923 is a prime.

It is a super-2 number, since 2×66880252019² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (66880252069) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1446392 + ... + 1491914.

It is an arithmetic number, because the mean of its divisors is an integer number (4894740480).

Almost surely, 2^66880252019 is an apocalyptic number.

66880252019 is a deficient number, since it is larger than the sum of its proper divisors (11435595661).

66880252019 is a wasteful number, since it uses less digits than its factorization.

66880252019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50690.

The product of its (nonzero) digits is 414720, while the sum is 47.

The spelling of 66880252019 in words is "sixty-six billion, eight hundred eighty million, two hundred fifty-two thousand, nineteen".