666233042021360 has 320 divisors, whose sum is σ = 1751168783738880. Its totient is φ = 233652534435840.

The previous prime is 666233042021357. The next prime is 666233042021369. The reversal of 666233042021360 is 63120240332666.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666233042021369) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 835996844 + ... + 836793396.

It is an arithmetic number, because the mean of its divisors is an integer number (5472402449184).

Almost surely, 2^{666233042021360} 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 666233042021360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (875584391869440).

666233042021360 is an abundant number, since it is smaller than the sum of its proper divisors (1084935741717520).

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

666233042021360 is a wasteful number, since it uses less digits than its factorization.

666233042021360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 796936 (or 796930 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 44.

The spelling of 666233042021360 in words is "six hundred sixty-six trillion, two hundred thirty-three billion, forty-two million, twenty-one thousand, three hundred sixty".