66888888886747 has 2 divisors, whose sum is σ = 66888888886748. Its totient is φ = 66888888886746.

The previous prime is 66888888886657. The next prime is 66888888886753. The reversal of 66888888886747 is 74768888888866.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66888888886747 - 2²⁷ = 66888754669019 is a prime.

It is not a weakly prime, because it can be changed into another prime (66888888886247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33444444443373 + 33444444443374.

It is an arithmetic number, because the mean of its divisors is an integer number (33444444443374).

Almost surely, 2^{66888888886747} is an apocalyptic number.

66888888886747 is a deficient number, since it is larger than the sum of its proper divisors (1).

66888888886747 is an equidigital number, since it uses as much as digits as its factorization.

66888888886747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 710280216576, while the sum is 100.

The spelling of 66888888886747 in words is "sixty-six trillion, eight hundred eighty-eight billion, eight hundred eighty-eight million, eight hundred eighty-six thousand, seven hundred forty-seven".