1266078495091 has 8 divisors (see below), whose sum is σ = 1268082226368. Its totient is φ = 1264075032000.

The previous prime is 1266078495067. The next prime is 1266078495103. The reversal of 1266078495091 is 1905948706621.

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 1266078495091 - 2³¹ = 1263931011443 is a prime.

It is a super-2 number, since 2×1266078495091² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1266078495061) 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, 10756086 + ... + 10873156.

It is an arithmetic number, because the mean of its divisors is an integer number (158510278296).

Almost surely, 2^{1266078495091} is an apocalyptic number.

1266078495091 is a deficient number, since it is larger than the sum of its proper divisors (2003731277).

1266078495091 is a wasteful number, since it uses less digits than its factorization.

1266078495091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134093.

The product of its (nonzero) digits is 6531840, while the sum is 58.

The spelling of 1266078495091 in words is "one trillion, two hundred sixty-six billion, seventy-eight million, four hundred ninety-five thousand, ninety-one".