1663633252663 has 16 divisors (see below), whose sum is σ = 1774916598240. Its totient is φ = 1554834960000.

The previous prime is 1663633252643. The next prime is 1663633252691. The reversal of 1663633252663 is 3662523363661.

It is a cyclic number.

It is not a de Polignac number, because 1663633252663 - 2³⁷ = 1526194299191 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1663633252663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1663633252613) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1033288 + ... + 2096413.

It is an arithmetic number, because the mean of its divisors is an integer number (110932287390).

Almost surely, 2^{1663633252663} is an apocalyptic number.

1663633252663 is a deficient number, since it is larger than the sum of its proper divisors (111283345577).

1663633252663 is a wasteful number, since it uses less digits than its factorization.

1663633252663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3130098.

The product of its digits is 12597120, while the sum is 52.

The spelling of 1663633252663 in words is "one trillion, six hundred sixty-three billion, six hundred thirty-three million, two hundred fifty-two thousand, six hundred sixty-three".