662591 has 2 divisors, whose sum is σ = 662592. Its totient is φ = 662590.

The previous prime is 662567. The next prime is 662617. The reversal of 662591 is 195266.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 662591 - 2⁶ = 662527 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a d-powerful number, because it can be written as 6² + 6² + 5 + 2¹⁷ + 9⁶ + 1 .

It is a plaindrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (662531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331295 + 331296.

It is an arithmetic number, because the mean of its divisors is an integer number (331296).

2⁶⁶²⁵⁹¹ is an apocalyptic number.

662591 is a deficient number, since it is larger than the sum of its proper divisors (1).

662591 is an equidigital number, since it uses as much as digits as its factorization.

662591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3240, while the sum is 29.

The square root of 662591 is about 813.9969287411. The cubic root of 662591 is about 87.1796613200.

The spelling of 662591 in words is "six hundred sixty-two thousand, five hundred ninety-one".