1263877666375 has 8 divisors (see below), whose sum is σ = 1577319327792. Its totient is φ = 1011102133000.

The previous prime is 1263877666369. The next prime is 1263877666379. The reversal of 1263877666375 is 5736667783621.

It is a de Polignac number, because none of the positive numbers 2^k-1263877666375 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 1263877666375.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1263877666379) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5055510541 + ... + 5055510790.

It is an arithmetic number, because the mean of its divisors is an integer number (197164915974).

Almost surely, 2^{1263877666375} is an apocalyptic number.

1263877666375 is a deficient number, since it is larger than the sum of its proper divisors (313441661417).

1263877666375 is an equidigital number, since it uses as much as digits as its factorization.

1263877666375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10111021346 (or 10111021336 counting only the distinct ones).

The product of its digits is 320060160, while the sum is 67.

The spelling of 1263877666375 in words is "one trillion, two hundred sixty-three billion, eight hundred seventy-seven million, six hundred sixty-six thousand, three hundred seventy-five".