4321401216660 has 576 divisors, whose sum is σ = 15151360573440. Its totient is φ = 986747520000.

The previous prime is 4321401216641. The next prime is 4321401216667. The reversal of 4321401216660 is 666121041234.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4321401216667) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 878509681 + ... + 878514599.

It is an arithmetic number, because the mean of its divisors is an integer number (26304445440).

Almost surely, 2^{4321401216660} 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 4321401216660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7575680286720).

4321401216660 is an abundant number, since it is smaller than the sum of its proper divisors (10829959356780).

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

4321401216660 is a wasteful number, since it uses less digits than its factorization.

4321401216660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5260 (or 5255 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

Adding to 4321401216660 its reverse (666121041234), we get a palindrome (4987522257894).

The spelling of 4321401216660 in words is "four trillion, three hundred twenty-one billion, four hundred one million, two hundred sixteen thousand, six hundred sixty".