1666934336101 has 2 divisors, whose sum is σ = 1666934336102. Its totient is φ = 1666934336100.

The previous prime is 1666934336083. The next prime is 1666934336117. The reversal of 1666934336101 is 1016334396661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1496964485025 + 169969851076 = 1223505^2 + 412274^2 .

It is a cyclic number.

It is not a de Polignac number, because 1666934336101 - 2¹³ = 1666934327909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1666934336161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 833467168050 + 833467168051.

It is an arithmetic number, because the mean of its divisors is an integer number (833467168051).

Almost surely, 2^{1666934336101} is an apocalyptic number.

It is an amenable number.

1666934336101 is a deficient number, since it is larger than the sum of its proper divisors (1).

1666934336101 is an equidigital number, since it uses as much as digits as its factorization.

1666934336101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1259712, while the sum is 49.

The spelling of 1666934336101 in words is "one trillion, six hundred sixty-six billion, nine hundred thirty-four million, three hundred thirty-six thousand, one hundred one".