11278067663 has 4 divisors (see below), whose sum is σ = 11282526168. Its totient is φ = 11273609160.

The previous prime is 11278067659. The next prime is 11278067677. The reversal of 11278067663 is 36676087211.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11278067663 - 2² = 11278067659 is a prime.

It is a super-2 number, since 2×11278067663² (a number of 21 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 (11278067653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2225456 + ... + 2230517.

It is an arithmetic number, because the mean of its divisors is an integer number (2820631542).

Almost surely, 2^11278067663 is an apocalyptic number.

11278067663 is a deficient number, since it is larger than the sum of its proper divisors (4458505).

11278067663 is an equidigital number, since it uses as much as digits as its factorization.

11278067663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4458504.

The product of its (nonzero) digits is 508032, while the sum is 47.

The spelling of 11278067663 in words is "eleven billion, two hundred seventy-eight million, sixty-seven thousand, six hundred sixty-three".