663094643 has 2 divisors, whose sum is σ = 663094644. Its totient is φ = 663094642.

The previous prime is 663094613. The next prime is 663094667. The reversal of 663094643 is 346490366.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 663094643 - 2²⁰ = 662046067 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 663094643.

It is not a weakly prime, because it can be changed into another prime (663094603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331547321 + 331547322.

It is an arithmetic number, because the mean of its divisors is an integer number (331547322).

Almost surely, 2^663094643 is an apocalyptic number.

663094643 is a deficient number, since it is larger than the sum of its proper divisors (1).

663094643 is an equidigital number, since it uses as much as digits as its factorization.

663094643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 279936, while the sum is 41.

The square root of 663094643 is about 25750.6241283585. The cubic root of 663094643 is about 872.0174447840.

The spelling of 663094643 in words is "six hundred sixty-three million, ninety-four thousand, six hundred forty-three".