20066358677 has 2 divisors, whose sum is σ = 20066358678. Its totient is φ = 20066358676.

The previous prime is 20066358661. The next prime is 20066358713. The reversal of 20066358677 is 77685366002.

20066358677 = 81784² + 81785² + 81786².

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18733670641 + 1332688036 = 136871^2 + 36506^2 .

It is a cyclic number.

It is not a de Polignac number, because 20066358677 - 2⁴ = 20066358661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20062358677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10033179338 + 10033179339.

It is an arithmetic number, because the mean of its divisors is an integer number (10033179339).

Almost surely, 2^20066358677 is an apocalyptic number.

It is an amenable number.

20066358677 is a deficient number, since it is larger than the sum of its proper divisors (1).

20066358677 is an equidigital number, since it uses as much as digits as its factorization.

20066358677 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2540160, while the sum is 50.

The spelling of 20066358677 in words is "twenty billion, sixty-six million, three hundred fifty-eight thousand, six hundred seventy-seven".