2106666671 has 2 divisors, whose sum is σ = 2106666672. Its totient is φ = 2106666670.

The previous prime is 2106666647. The next prime is 2106666677. The reversal of 2106666671 is 1766666012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2106666671 - 2²² = 2102472367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2106666677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1053333335 + 1053333336.

It is an arithmetic number, because the mean of its divisors is an integer number (1053333336).

Almost surely, 2^2106666671 is an apocalyptic number.

2106666671 is a deficient number, since it is larger than the sum of its proper divisors (1).

2106666671 is an equidigital number, since it uses as much as digits as its factorization.

2106666671 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 2106666671 is about 45898.4386553617. The cubic root of 2106666671 is about 1281.9328446386.

The spelling of 2106666671 in words is "two billion, one hundred six million, six hundred sixty-six thousand, six hundred seventy-one".