1266771683158 has 16 divisors (see below), whose sum is σ = 1908250169760. Its totient is φ = 630688867200.

The previous prime is 1266771683153. The next prime is 1266771683159. The reversal of 1266771683158 is 8513861776621.

It is a junction number, because it is equal to n+sod(n) for n = 1266771683096 and 1266771683105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266771683153) 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, 4430248 + ... + 4707508.

It is an arithmetic number, because the mean of its divisors is an integer number (119265635610).

Almost surely, 2^{1266771683158} is an apocalyptic number.

1266771683158 is a deficient number, since it is larger than the sum of its proper divisors (641478486602).

1266771683158 is a wasteful number, since it uses less digits than its factorization.

1266771683158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286983.

The product of its digits is 20321280, while the sum is 61.

The spelling of 1266771683158 in words is "one trillion, two hundred sixty-six billion, seven hundred seventy-one million, six hundred eighty-three thousand, one hundred fifty-eight".