66327673987 has 2 divisors, whose sum is σ = 66327673988. Its totient is φ = 66327673986.

The previous prime is 66327673981. The next prime is 66327674033. The reversal of 66327673987 is 78937672366.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66327673987 - 2⁷ = 66327673859 is a prime.

It is not a weakly prime, because it can be changed into another prime (66327673981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33163836993 + 33163836994.

It is an arithmetic number, because the mean of its divisors is an integer number (33163836994).

Almost surely, 2^66327673987 is an apocalyptic number.

66327673987 is a deficient number, since it is larger than the sum of its proper divisors (1).

66327673987 is an equidigital number, since it uses as much as digits as its factorization.

66327673987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96018048, while the sum is 64.

The spelling of 66327673987 in words is "sixty-six billion, three hundred twenty-seven million, six hundred seventy-three thousand, nine hundred eighty-seven".