66888754669019 has 2 divisors, whose sum is σ = 66888754669020. Its totient is φ = 66888754669018.

The previous prime is 66888754668971. The next prime is 66888754669049. The reversal of 66888754669019 is 91096645788866.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66888754669019 - 2³² = 66884459701723 is a prime.

It is a super-2 number, since 2×66888754669019² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66888754669049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33444377334509 + 33444377334510.

It is an arithmetic number, because the mean of its divisors is an integer number (33444377334510).

Almost surely, 2^{66888754669019} is an apocalyptic number.

66888754669019 is a deficient number, since it is larger than the sum of its proper divisors (1).

66888754669019 is an equidigital number, since it uses as much as digits as its factorization.

66888754669019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7524679680, while the sum is 83.

The spelling of 66888754669019 in words is "sixty-six trillion, eight hundred eighty-eight billion, seven hundred fifty-four million, six hundred sixty-nine thousand, nineteen".