662666047 has 2 divisors, whose sum is σ = 662666048. Its totient is φ = 662666046.

The previous prime is 662666033. The next prime is 662666051. The reversal of 662666047 is 740666266.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 662666047 - 2¹¹ = 662663999 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 662665994 and 662666012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (662666057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331333023 + 331333024.

It is an arithmetic number, because the mean of its divisors is an integer number (331333024).

Almost surely, 2^662666047 is an apocalyptic number.

662666047 is a deficient number, since it is larger than the sum of its proper divisors (1).

662666047 is an equidigital number, since it uses as much as digits as its factorization.

662666047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 43.

The square root of 662666047 is about 25742.3007324520. The cubic root of 662666047 is about 871.8295260379.

The spelling of 662666047 in words is "six hundred sixty-two million, six hundred sixty-six thousand, forty-seven".