111666000501 has 12 divisors (see below), whose sum is σ = 175958546400. Its totient is φ = 67676363880.

The previous prime is 111666000491. The next prime is 111666000521. The reversal of 111666000501 is 105000666111.

It is not a de Polignac number, because 111666000501 - 2¹⁸ = 111665738357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111666000521) 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, 563969601 + ... + 563969798.

It is an arithmetic number, because the mean of its divisors is an integer number (14663212200).

Almost surely, 2^111666000501 is an apocalyptic number.

111666000501 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111666000501 is a deficient number, since it is larger than the sum of its proper divisors (64292545899).

111666000501 is a wasteful number, since it uses less digits than its factorization.

111666000501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1127939416 (or 1127939413 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

Adding to 111666000501 its reverse (105000666111), we get a palindrome (216666666612).

The spelling of 111666000501 in words is "one hundred eleven billion, six hundred sixty-six million, five hundred one", and thus it is an aban number.