1266266655431 has 8 divisors (see below), whose sum is σ = 1273210713600. Its totient is φ = 1259341545312.

The previous prime is 1266266655389. The next prime is 1266266655463. The reversal of 1266266655431 is 1345566626621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1266266655431 - 2¹⁰ = 1266266654407 is a prime.

It is a super-2 number, since 2×1266266655431² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266266655481) 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, 4602980 + ... + 4870313.

It is an arithmetic number, because the mean of its divisors is an integer number (159151339200).

Almost surely, 2^{1266266655431} is an apocalyptic number.

1266266655431 is a deficient number, since it is larger than the sum of its proper divisors (6944058169).

1266266655431 is an equidigital number, since it uses as much as digits as its factorization.

1266266655431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9474025.

The product of its digits is 9331200, while the sum is 53.

The spelling of 1266266655431 in words is "one trillion, two hundred sixty-six billion, two hundred sixty-six million, six hundred fifty-five thousand, four hundred thirty-one".