666132603735550 has 24 divisors (see below), whose sum is σ = 1416007591941456. Its totient is φ = 228388321280640.

The previous prime is 666132603735523. The next prime is 666132603735589. The reversal of 666132603735550 is 55537306231666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 951618004987 + ... + 951618005686.

It is an arithmetic number, because the mean of its divisors is an integer number (59000316330894).

Almost surely, 2^{666132603735550} is an apocalyptic number.

666132603735550 is an abundant number, since it is smaller than the sum of its proper divisors (749874988205906).

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

666132603735550 is a wasteful number, since it uses less digits than its factorization.

666132603735550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1903236010692 (or 1903236010687 counting only the distinct ones).

The product of its (nonzero) digits is 61236000, while the sum is 58.

The spelling of 666132603735550 in words is "six hundred sixty-six trillion, one hundred thirty-two billion, six hundred three million, seven hundred thirty-five thousand, five hundred fifty".