66678898163 has 2 divisors, whose sum is σ = 66678898164. Its totient is φ = 66678898162.

The previous prime is 66678898127. The next prime is 66678898183. The reversal of 66678898163 is 36189887666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66678898163 - 2¹⁴ = 66678881779 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66678898093 and 66678898102.

It is not a weakly prime, because it can be changed into another prime (66678898183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33339449081 + 33339449082.

It is an arithmetic number, because the mean of its divisors is an integer number (33339449082).

Almost surely, 2^66678898163 is an apocalyptic number.

66678898163 is a deficient number, since it is larger than the sum of its proper divisors (1).

66678898163 is an equidigital number, since it uses as much as digits as its factorization.

66678898163 is an evil number, because the sum of its binary digits is even.

The product of its digits is 125411328, while the sum is 68.

The spelling of 66678898163 in words is "sixty-six billion, six hundred seventy-eight million, eight hundred ninety-eight thousand, one hundred sixty-three".