23166305255477 has 2 divisors, whose sum is σ = 23166305255478. Its totient is φ = 23166305255476.

The previous prime is 23166305255447. The next prime is 23166305255519. The reversal of 23166305255477 is 77455250366132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13384761273361 + 9781543982116 = 3658519^2 + 3127546^2 .

It is a cyclic number.

It is not a de Polignac number, because 23166305255477 - 2¹⁰ = 23166305254453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23166305255447) 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, 11583152627738 + 11583152627739.

It is an arithmetic number, because the mean of its divisors is an integer number (11583152627739).

Almost surely, 2^{23166305255477} is an apocalyptic number.

It is an amenable number.

23166305255477 is a deficient number, since it is larger than the sum of its proper divisors (1).

23166305255477 is an equidigital number, since it uses as much as digits as its factorization.

23166305255477 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31752000, while the sum is 56.

The spelling of 23166305255477 in words is "twenty-three trillion, one hundred sixty-six billion, three hundred five million, two hundred fifty-five thousand, four hundred seventy-seven".