663261461263 has 2 divisors, whose sum is σ = 663261461264. Its totient is φ = 663261461262.

The previous prime is 663261461237. The next prime is 663261461281. The reversal of 663261461263 is 362164162366.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 663261461263 - 2²⁹ = 662724590351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (663261461663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331630730631 + 331630730632.

It is an arithmetic number, because the mean of its divisors is an integer number (331630730632).

Almost surely, 2^663261461263 is an apocalyptic number.

663261461263 is a deficient number, since it is larger than the sum of its proper divisors (1).

663261461263 is an equidigital number, since it uses as much as digits as its factorization.

663261461263 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1119744, while the sum is 46.

The spelling of 663261461263 in words is "six hundred sixty-three billion, two hundred sixty-one million, four hundred sixty-one thousand, two hundred sixty-three".