666111412200 has 96 divisors (see below), whose sum is σ = 2223787356000. Its totient is φ = 163965884160.

The previous prime is 666111412091. The next prime is 666111412249. The reversal of 666111412200 is 2214111666.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42691650 + ... + 42707249.

It is an arithmetic number, because the mean of its divisors is an integer number (23164451625).

Almost surely, 2^666111412200 is an apocalyptic number.

666111412200 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

666111412200 is an abundant number, since it is smaller than the sum of its proper divisors (1557675943800).

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

666111412200 is a wasteful number, since it uses less digits than its factorization.

666111412200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85398931 (or 85398922 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

Adding to 666111412200 its reverse (2214111666), we get a palindrome (668325523866).

The spelling of 666111412200 in words is "six hundred sixty-six billion, one hundred eleven million, four hundred twelve thousand, two hundred".