11663042777 has 4 divisors (see below), whose sum is σ = 11664301236. Its totient is φ = 11661784320.

The previous prime is 11663042753. The next prime is 11663042789. The reversal of 11663042777 is 77724036611.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5913763801 + 5749278976 = 76901^2 + 75824^2 .

It is a cyclic number.

It is not a de Polignac number, because 11663042777 - 2¹⁴ = 11663026393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11663042717) 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, 615224 + ... + 633897.

It is an arithmetic number, because the mean of its divisors is an integer number (2916075309).

Almost surely, 2^11663042777 is an apocalyptic number.

It is an amenable number.

11663042777 is a deficient number, since it is larger than the sum of its proper divisors (1258459).

11663042777 is an equidigital number, since it uses as much as digits as its factorization.

11663042777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1258458.

The product of its (nonzero) digits is 296352, while the sum is 44.

The spelling of 11663042777 in words is "eleven billion, six hundred sixty-three million, forty-two thousand, seven hundred seventy-seven".