663071 has 2 divisors, whose sum is σ = 663072. Its totient is φ = 663070.

The previous prime is 663053. The next prime is 663097. The reversal of 663071 is 170366.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 663071 - 2⁶ = 663007 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (663001) 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, 331535 + 331536.

It is an arithmetic number, because the mean of its divisors is an integer number (331536).

2⁶⁶³⁰⁷¹ is an apocalyptic number.

663071 is a deficient number, since it is larger than the sum of its proper divisors (1).

663071 is an equidigital number, since it uses as much as digits as its factorization.

663071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 663071 is about 814.2917167699. The cubic root of 663071 is about 87.2007080575.

The spelling of 663071 in words is "six hundred sixty-three thousand, seventy-one".