666527484672 has 864 divisors, whose sum is σ = 2404725120000. Its totient is φ = 181330845696.

The previous prime is 666527484583. The next prime is 666527484719. The reversal of 666527484672 is 276484725666.

It is a tau number, because it is divible by the number of its divisors (864).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 775933779 + ... + 775934637.

Almost surely, 2^666527484672 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 666527484672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1202362560000).

666527484672 is an abundant number, since it is smaller than the sum of its proper divisors (1738197635328).

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

666527484672 is a wasteful number, since it uses less digits than its factorization.

666527484672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1006 (or 979 counting only the distinct ones).

The product of its digits is 162570240, while the sum is 63.

The spelling of 666527484672 in words is "six hundred sixty-six billion, five hundred twenty-seven million, four hundred eighty-four thousand, six hundred seventy-two".