666134612435502 has 160 divisors (see below), whose sum is σ = 1720455788789760. Its totient is φ = 188698685011200.

The previous prime is 666134612435489. The next prime is 666134612435543. The reversal of 666134612435502 is 205534216431666.

666134612435502 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 212889627 + ... + 215995977.

It is an arithmetic number, because the mean of its divisors is an integer number (10752848679936).

Almost surely, 2^{666134612435502} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 666134612435502, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (860227894394880).

666134612435502 is an abundant number, since it is smaller than the sum of its proper divisors (1054321176354258).

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

666134612435502 is a wasteful number, since it uses less digits than its factorization.

666134612435502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3107988 (or 3107979 counting only the distinct ones).

The product of its (nonzero) digits is 18662400, while the sum is 54.

The spelling of 666134612435502 in words is "six hundred sixty-six trillion, one hundred thirty-four billion, six hundred twelve million, four hundred thirty-five thousand, five hundred two".