6566165200457 has 2 divisors, whose sum is σ = 6566165200458. Its totient is φ = 6566165200456.

The previous prime is 6566165200453. The next prime is 6566165200537. The reversal of 6566165200457 is 7540025616656.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4005617971216 + 2560547229241 = 2001404^2 + 1600171^2 .

It is a cyclic number.

It is not a de Polignac number, because 6566165200457 - 2² = 6566165200453 is a prime.

It is a super-2 number, since 2×6566165200457² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6566165200399 and 6566165200408.

It is not a weakly prime, because it can be changed into another prime (6566165200453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3283082600228 + 3283082600229.

It is an arithmetic number, because the mean of its divisors is an integer number (3283082600229).

Almost surely, 2^{6566165200457} is an apocalyptic number.

It is an amenable number.

6566165200457 is a deficient number, since it is larger than the sum of its proper divisors (1).

6566165200457 is an equidigital number, since it uses as much as digits as its factorization.

6566165200457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072000, while the sum is 53.

The spelling of 6566165200457 in words is "six trillion, five hundred sixty-six billion, one hundred sixty-five million, two hundred thousand, four hundred fifty-seven".