655019663 has 2 divisors, whose sum is σ = 655019664. Its totient is φ = 655019662.

The previous prime is 655019641. The next prime is 655019747. The reversal of 655019663 is 366910556.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 655019663 - 2²² = 650825359 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 655019663.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (655019063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327509831 + 327509832.

It is an arithmetic number, because the mean of its divisors is an integer number (327509832).

Almost surely, 2^655019663 is an apocalyptic number.

655019663 is a deficient number, since it is larger than the sum of its proper divisors (1).

655019663 is an equidigital number, since it uses as much as digits as its factorization.

655019663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145800, while the sum is 41.

The square root of 655019663 is about 25593.3519297493. The cubic root of 655019663 is about 868.4632504759.

The spelling of 655019663 in words is "six hundred fifty-five million, nineteen thousand, six hundred sixty-three".