665500000055000 has 160 divisors (see below), whose sum is σ = 1702825803130320. Its totient is φ = 241742808000000.

The previous prime is 665500000054997. The next prime is 665500000055021. The reversal of 665500000055000 is 550000005566.

It is a zygodrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 45325670 + ... + 58184330.

It is the magic constant of a 110000 × 110000 magic square.

Almost surely, 2^{665500000055000} 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 665500000055000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (851412901565160).

665500000055000 is an abundant number, since it is smaller than the sum of its proper divisors (1037325803075320).

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

665500000055000 is a wasteful number, since it uses less digits than its factorization.

665500000055000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12859639 (or 12859620 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 32.

The spelling of 665500000055000 in words is "six hundred sixty-five trillion, five hundred billion, fifty-five thousand".