663665627 has 2 divisors, whose sum is σ = 663665628. Its totient is φ = 663665626.

The previous prime is 663665549. The next prime is 663665659. The reversal of 663665627 is 726566366.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 663665627 - 2¹⁴ = 663649243 is a prime.

It is a super-2 number, since 2×663665627² = 880904128922606258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (663665677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331832813 + 331832814.

It is an arithmetic number, because the mean of its divisors is an integer number (331832814).

Almost surely, 2^663665627 is an apocalyptic number.

663665627 is a deficient number, since it is larger than the sum of its proper divisors (1).

663665627 is an equidigital number, since it uses as much as digits as its factorization.

663665627 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1632960, while the sum is 47.

The square root of 663665627 is about 25761.7085419426. The cubic root of 663665627 is about 872.2676680705.

The spelling of 663665627 in words is "six hundred sixty-three million, six hundred sixty-five thousand, six hundred twenty-seven".