666223461411420 has 96 divisors (see below), whose sum is σ = 2035341131120640. Its totient is φ = 161482425429760.

The previous prime is 666223461411407. The next prime is 666223461411421. The reversal of 666223461411420 is 24114164322666.

It is a self number, because there is not a number n which added to its sum of digits gives 666223461411420.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666223461411421) 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, 78106575 + ... + 86215334.

It is an arithmetic number, because the mean of its divisors is an integer number (21201470115840).

Almost surely, 2^{666223461411420} is an apocalyptic number.

666223461411420 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

666223461411420 is an abundant number, since it is smaller than the sum of its proper divisors (1369117669709220).

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

666223461411420 is a wasteful number, since it uses less digits than its factorization.

666223461411420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164328075 (or 164328073 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 48.

The spelling of 666223461411420 in words is "six hundred sixty-six trillion, two hundred twenty-three billion, four hundred sixty-one million, four hundred eleven thousand, four hundred twenty".