111666557010 has 64 divisors (see below), whose sum is σ = 277132067712. Its totient is φ = 28779818496.

The previous prime is 111666557003. The next prime is 111666557011. The reversal of 111666557010 is 10755666111.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 111666557010.

It is not an unprimeable number, because it can be changed into a prime (111666557011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 417579 + ... + 630638.

It is an arithmetic number, because the mean of its divisors is an integer number (4330188558).

Almost surely, 2^111666557010 is an apocalyptic number.

111666557010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

111666557010 is an abundant number, since it is smaller than the sum of its proper divisors (165465510702).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111666557010 is a wasteful number, since it uses less digits than its factorization.

111666557010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1048347.

The product of its (nonzero) digits is 37800, while the sum is 39.

The spelling of 111666557010 in words is "one hundred eleven billion, six hundred sixty-six million, five hundred fifty-seven thousand, ten".