666652025088 has 1152 divisors, whose sum is σ = 2441340518400. Its totient is φ = 175352905728.

The previous prime is 666652025087. The next prime is 666652025089. The reversal of 666652025088 is 880520256666.

It is an interprime number because it is at equal distance from previous prime (666652025087) and next prime (666652025089).

It is a tau number, because it is divible by the number of its divisors (1152).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (666652025087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 5249228481 + ... + 5249228607.

It is an arithmetic number, because the mean of its divisors is an integer number (2119219200).

Almost surely, 2^666652025088 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 666652025088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1220670259200).

666652025088 is an abundant number, since it is smaller than the sum of its proper divisors (1774688493312).

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

666652025088 is a wasteful number, since it uses less digits than its factorization.

666652025088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324 (or 304 counting only the distinct ones).

The product of its (nonzero) digits is 8294400, while the sum is 54.

The spelling of 666652025088 in words is "six hundred sixty-six billion, six hundred fifty-two million, twenty-five thousand, eighty-eight".