820966469177 has 2 divisors, whose sum is σ = 820966469178. Its totient is φ = 820966469176.

The previous prime is 820966469119. The next prime is 820966469231. The reversal of 820966469177 is 771964669028.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 560972538361 + 259993930816 = 748981^2 + 509896^2 .

It is a cyclic number.

It is not a de Polignac number, because 820966469177 - 2²⁸ = 820698033721 is a prime.

It is not a weakly prime, because it can be changed into another prime (820966469077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410483234588 + 410483234589.

It is an arithmetic number, because the mean of its divisors is an integer number (410483234589).

Almost surely, 2^820966469177 is an apocalyptic number.

It is an amenable number.

820966469177 is a deficient number, since it is larger than the sum of its proper divisors (1).

820966469177 is an equidigital number, since it uses as much as digits as its factorization.

820966469177 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54867456, while the sum is 65.

The spelling of 820966469177 in words is "eight hundred twenty billion, nine hundred sixty-six million, four hundred sixty-nine thousand, one hundred seventy-seven".