666334771200 has 1296 divisors, whose sum is σ = 2881437216840. Its totient is φ = 152165744640.

The previous prime is 666334771163. The next prime is 666334771229. The reversal of 666334771200 is 2177433666.

It is a tau number, because it is divible by the number of its divisors (1296).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 609637854 + ... + 609638946.

Almost surely, 2^666334771200 is an apocalyptic number.

666334771200 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 666334771200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1440718608420).

666334771200 is an abundant number, since it is smaller than the sum of its proper divisors (2215102445640).

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

666334771200 is a wasteful number, since it uses less digits than its factorization.

666334771200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1154 (or 1110 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 45.

The spelling of 666334771200 in words is "six hundred sixty-six billion, three hundred thirty-four million, seven hundred seventy-one thousand, two hundred".