66888888884803 has 2 divisors, whose sum is σ = 66888888884804. Its totient is φ = 66888888884802.

The previous prime is 66888888884791. The next prime is 66888888884813. The reversal of 66888888884803 is 30848888888866.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66888888884803 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66888888884699 and 66888888884708.

It is not a weakly prime, because it can be changed into another prime (66888888884813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33444444442401 + 33444444442402.

It is an arithmetic number, because the mean of its divisors is an integer number (33444444442402).

Almost surely, 2^{66888888884803} is an apocalyptic number.

66888888884803 is a deficient number, since it is larger than the sum of its proper divisors (1).

66888888884803 is an equidigital number, since it uses as much as digits as its factorization.

66888888884803 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 57982058496, while the sum is 91.

The spelling of 66888888884803 in words is "sixty-six trillion, eight hundred eighty-eight billion, eight hundred eighty-eight million, eight hundred eighty-four thousand, eight hundred three".