20763665666699 has 2 divisors, whose sum is σ = 20763665666700. Its totient is φ = 20763665666698.

The previous prime is 20763665666617. The next prime is 20763665666701. The reversal of 20763665666699 is 99666656636702.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20763665666699 - 2¹² = 20763665662603 is a prime.

It is a super-2 number, since 2×20763665666699² (a number of 27 digits) contains 22 as substring.

Together with 20763665666701, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20763665666099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10381832833349 + 10381832833350.

It is an arithmetic number, because the mean of its divisors is an integer number (10381832833350).

Almost surely, 2^{20763665666699} is an apocalyptic number.

20763665666699 is a deficient number, since it is larger than the sum of its proper divisors (1).

20763665666699 is an equidigital number, since it uses as much as digits as its factorization.

20763665666699 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4761711360, while the sum is 77.

The spelling of 20763665666699 in words is "twenty trillion, seven hundred sixty-three billion, six hundred sixty-five million, six hundred sixty-six thousand, six hundred ninety-nine".