4366521666497 has 2 divisors, whose sum is σ = 4366521666498. Its totient is φ = 4366521666496.

The previous prime is 4366521666469. The next prime is 4366521666581. The reversal of 4366521666497 is 7946661256634.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3937351244176 + 429170422321 = 1984276^2 + 655111^2 .

It is a cyclic number.

It is not a de Polignac number, because 4366521666497 - 2¹² = 4366521662401 is a prime.

It is a super-2 number, since 2×4366521666497² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (4366521666697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2183260833248 + 2183260833249.

It is an arithmetic number, because the mean of its divisors is an integer number (2183260833249).

Almost surely, 2^{4366521666497} is an apocalyptic number.

It is an amenable number.

4366521666497 is a deficient number, since it is larger than the sum of its proper divisors (1).

4366521666497 is an equidigital number, since it uses as much as digits as its factorization.

4366521666497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 235146240, while the sum is 65.

The spelling of 4366521666497 in words is "four trillion, three hundred sixty-six billion, five hundred twenty-one million, six hundred sixty-six thousand, four hundred ninety-seven".