166768425101 has 2 divisors, whose sum is σ = 166768425102. Its totient is φ = 166768425100.

The previous prime is 166768425079. The next prime is 166768425119. The reversal of 166768425101 is 101524867661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122300581225 + 44467843876 = 349715^2 + 210874^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166768425101 is a prime.

It is a super-2 number, since 2×166768425101² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166768425151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83384212550 + 83384212551.

It is an arithmetic number, because the mean of its divisors is an integer number (83384212551).

Almost surely, 2^166768425101 is an apocalyptic number.

It is an amenable number.

166768425101 is a deficient number, since it is larger than the sum of its proper divisors (1).

166768425101 is an equidigital number, since it uses as much as digits as its factorization.

166768425101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 483840, while the sum is 47.

The spelling of 166768425101 in words is "one hundred sixty-six billion, seven hundred sixty-eight million, four hundred twenty-five thousand, one hundred one".