11267816661 has 8 divisors (see below), whose sum is σ = 16693061760. Its totient is φ = 7511877756.

The previous prime is 11267816657. The next prime is 11267816663. The reversal of 11267816661 is 16661876211.

It is not a de Polignac number, because 11267816661 - 2² = 11267816657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11267816663) 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, 208663245 + ... + 208663298.

It is an arithmetic number, because the mean of its divisors is an integer number (2086632720).

Almost surely, 2^11267816661 is an apocalyptic number.

It is an amenable number.

11267816661 is a deficient number, since it is larger than the sum of its proper divisors (5425245099).

11267816661 is an equidigital number, since it uses as much as digits as its factorization.

11267816661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417326552 (or 417326546 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The spelling of 11267816661 in words is "eleven billion, two hundred sixty-seven million, eight hundred sixteen thousand, six hundred sixty-one".