166021027332047 has 2 divisors, whose sum is σ = 166021027332048. Its totient is φ = 166021027332046.

The previous prime is 166021027331989. The next prime is 166021027332101. The reversal of 166021027332047 is 740233720120661.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166021027332047 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166021027331989 and 166021027332007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166021027302047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83010513666023 + 83010513666024.

It is an arithmetic number, because the mean of its divisors is an integer number (83010513666024).

Almost surely, 2^{166021027332047} is an apocalyptic number.

166021027332047 is a deficient number, since it is larger than the sum of its proper divisors (1).

166021027332047 is an equidigital number, since it uses as much as digits as its factorization.

166021027332047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 508032, while the sum is 44.

The spelling of 166021027332047 in words is "one hundred sixty-six trillion, twenty-one billion, twenty-seven million, three hundred thirty-two thousand, forty-seven".