166897245451 has 2 divisors, whose sum is σ = 166897245452. Its totient is φ = 166897245450.

The previous prime is 166897245439. The next prime is 166897245457. The reversal of 166897245451 is 154542798661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166897245451 - 2⁵ = 166897245419 is a prime.

It is not a weakly prime, because it can be changed into another prime (166897245457) 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, 83448622725 + 83448622726.

It is an arithmetic number, because the mean of its divisors is an integer number (83448622726).

Almost surely, 2^166897245451 is an apocalyptic number.

166897245451 is a deficient number, since it is larger than the sum of its proper divisors (1).

166897245451 is an equidigital number, since it uses as much as digits as its factorization.

166897245451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14515200, while the sum is 58.

The spelling of 166897245451 in words is "one hundred sixty-six billion, eight hundred ninety-seven million, two hundred forty-five thousand, four hundred fifty-one".