666022550460 has 96 divisors (see below), whose sum is σ = 1888117862400. Its totient is φ = 175404668160.

The previous prime is 666022550443. The next prime is 666022550497. The reversal of 666022550460 is 64055220666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1383886 + ... + 1801994.

It is an arithmetic number, because the mean of its divisors is an integer number (19667894400).

Almost surely, 2^666022550460 is an apocalyptic number.

666022550460 is a gapful number since it is divisible by the number (60) 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 666022550460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (944058931200).

666022550460 is an abundant number, since it is smaller than the sum of its proper divisors (1222095311940).

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

666022550460 is a wasteful number, since it uses less digits than its factorization.

666022550460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418451 (or 418449 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 42.

The spelling of 666022550460 in words is "six hundred sixty-six billion, twenty-two million, five hundred fifty thousand, four hundred sixty".