1266691442355 has 224 divisors, whose sum is σ = 2478765348864. Its totient is φ = 618716786688.

The previous prime is 1266691442299. The next prime is 1266691442371. The reversal of 1266691442355 is 5532441966621.

It is not a de Polignac number, because 1266691442355 - 2¹⁸ = 1266691180211 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 223 ways as a sum of consecutive naturals, for example, 417084897 + ... + 417087933.

It is an arithmetic number, because the mean of its divisors is an integer number (11065916736).

Almost surely, 2^{1266691442355} is an apocalyptic number.

1266691442355 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1266691442355 is a deficient number, since it is larger than the sum of its proper divisors (1212073906509).

1266691442355 is a wasteful number, since it uses less digits than its factorization.

1266691442355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3257 (or 3242 counting only the distinct ones).

The product of its digits is 9331200, while the sum is 54.

The spelling of 1266691442355 in words is "one trillion, two hundred sixty-six billion, six hundred ninety-one million, four hundred forty-two thousand, three hundred fifty-five".