666466517760 has 288 divisors, whose sum is σ = 2246054469120. Its totient is φ = 168085192704.

The previous prime is 666466517747. The next prime is 666466517767. The reversal of 666466517760 is 67715664666.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a junction number, because it is equal to n+sod(n) for n = 666466517694 and 666466517703.

It is not an unprimeable number, because it can be changed into a prime (666466517767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7818087 + ... + 7902873.

It is an arithmetic number, because the mean of its divisors is an integer number (7798800240).

Almost surely, 2^666466517760 is an apocalyptic number.

666466517760 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 666466517760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1123027234560).

666466517760 is an abundant number, since it is smaller than the sum of its proper divisors (1579587951360).

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

666466517760 is a wasteful number, since it uses less digits than its factorization.

666466517760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84923 (or 84909 counting only the distinct ones).

The product of its (nonzero) digits is 45722880, while the sum is 60.

The spelling of 666466517760 in words is "six hundred sixty-six billion, four hundred sixty-six million, five hundred seventeen thousand, seven hundred sixty".