666345111432 has 768 divisors, whose sum is σ = 2415983431680. Its totient is φ = 148636477440.

The previous prime is 666345111379. The next prime is 666345111449. The reversal of 666345111432 is 234111543666.

It is a happy number.

666345111432 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 224887183 + ... + 224890145.

It is an arithmetic number, because the mean of its divisors is an integer number (3145811760).

Almost surely, 2^666345111432 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 666345111432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1207991715840).

666345111432 is an abundant number, since it is smaller than the sum of its proper divisors (1749638320248).

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

666345111432 is a wasteful number, since it uses less digits than its factorization.

666345111432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3074 (or 3059 counting only the distinct ones).

The product of its digits is 311040, while the sum is 42.

It can be divided in two parts, 666345 and 111432, that added together give a palindrome (777777).

The spelling of 666345111432 in words is "six hundred sixty-six billion, three hundred forty-five million, one hundred eleven thousand, four hundred thirty-two".