1266979862363 has 2 divisors, whose sum is σ = 1266979862364. Its totient is φ = 1266979862362.

The previous prime is 1266979862341. The next prime is 1266979862413. The reversal of 1266979862363 is 3632689796621.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1266979862363 - 2⁸ = 1266979862107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1266979862293 and 1266979862302.

It is not a weakly prime, because it can be changed into another prime (1266979862263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 633489931181 + 633489931182.

It is an arithmetic number, because the mean of its divisors is an integer number (633489931182).

Almost surely, 2^{1266979862363} is an apocalyptic number.

1266979862363 is a deficient number, since it is larger than the sum of its proper divisors (1).

1266979862363 is an equidigital number, since it uses as much as digits as its factorization.

1266979862363 is an evil number, because the sum of its binary digits is even.

The product of its digits is 211631616, while the sum is 68.

The spelling of 1266979862363 in words is "one trillion, two hundred sixty-six billion, nine hundred seventy-nine million, eight hundred sixty-two thousand, three hundred sixty-three".