20666104367 has 2 divisors, whose sum is σ = 20666104368. Its totient is φ = 20666104366.

The previous prime is 20666104297. The next prime is 20666104369. The reversal of 20666104367 is 76340166602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20666104367 - 2¹⁰ = 20666103343 is a prime.

It is a super-3 number, since 3×20666104367³ (a number of 32 digits) contains 333 as substring.

Together with 20666104369, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20666104369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10333052183 + 10333052184.

It is an arithmetic number, because the mean of its divisors is an integer number (10333052184).

Almost surely, 2^20666104367 is an apocalyptic number.

20666104367 is a deficient number, since it is larger than the sum of its proper divisors (1).

20666104367 is an equidigital number, since it uses as much as digits as its factorization.

20666104367 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 41.

The spelling of 20666104367 in words is "twenty billion, six hundred sixty-six million, one hundred four thousand, three hundred sixty-seven".