666430215424 has 288 divisors, whose sum is σ = 1492725024000. Its totient is φ = 295636303872.

The previous prime is 666430215413. The next prime is 666430215431. The reversal of 666430215424 is 424512034666.

It is a super-3 number, since 3×666430215424³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 725168437 + ... + 725169355.

It is an arithmetic number, because the mean of its divisors is an integer number (5183073000).

Almost surely, 2^666430215424 is an apocalyptic number.

666430215424 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 666430215424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (746362512000).

666430215424 is an abundant number, since it is smaller than the sum of its proper divisors (826294808576).

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

666430215424 is a wasteful number, since it uses less digits than its factorization.

666430215424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1133 (or 1119 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 43.

The spelling of 666430215424 in words is "six hundred sixty-six billion, four hundred thirty million, two hundred fifteen thousand, four hundred twenty-four".