11166649911 has 12 divisors (see below), whose sum is σ = 16350559888. Its totient is φ = 7342454304.

The previous prime is 11166649883. The next prime is 11166649951. The reversal of 11166649911 is 11994666111.

It is a happy number.

It is not a de Polignac number, because 11166649911 - 2⁷ = 11166649783 is a prime.

It is a super-4 number, since 4×11166649911⁴ (a number of 41 digits) contains 4444 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 (11166649951) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8497555 + ... + 8498868.

Almost surely, 2^11166649911 is an apocalyptic number.

11166649911 is a deficient number, since it is larger than the sum of its proper divisors (5183909977).

11166649911 is a wasteful number, since it uses less digits than its factorization.

11166649911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16996502 (or 16996499 counting only the distinct ones).

The product of its digits is 69984, while the sum is 45.

The spelling of 11166649911 in words is "eleven billion, one hundred sixty-six million, six hundred forty-nine thousand, nine hundred eleven".