11021267666 has 4 divisors (see below), whose sum is σ = 16531901502. Its totient is φ = 5510633832.

The previous prime is 11021267629. The next prime is 11021267723. The reversal of 11021267666 is 66676212011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66676212011 = 147773 ⋅451207.

It can be written as a sum of positive squares in only one way, i.e., 7112392225 + 3908875441 = 84335^2 + 62521^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2755316915 + ... + 2755316918.

Almost surely, 2^11021267666 is an apocalyptic number.

11021267666 is a deficient number, since it is larger than the sum of its proper divisors (5510633836).

11021267666 is an equidigital number, since it uses as much as digits as its factorization.

11021267666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5510633835.

The product of its (nonzero) digits is 36288, while the sum is 38.

Adding to 11021267666 its reverse (66676212011), we get a palindrome (77697479677).

The spelling of 11021267666 in words is "eleven billion, twenty-one million, two hundred sixty-seven thousand, six hundred sixty-six".