66555150000 has 120 divisors (see below), whose sum is σ = 214904401488. Its totient is φ = 17748000000.

The previous prime is 66555149971. The next prime is 66555150007. The reversal of 66555150000 is 5155566.

It is a tau number, because it is divible by the number of its divisors (120).

It is not an unprimeable number, because it can be changed into a prime (66555150007) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 71851 + ... + 371850.

Almost surely, 2^66555150000 is an apocalyptic number.

66555150000 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66555150000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107452200744).

66555150000 is an abundant number, since it is smaller than the sum of its proper divisors (148349251488).

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

66555150000 is an equidigital number, since it uses as much as digits as its factorization.

66555150000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443737 (or 443711 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 33.

The spelling of 66555150000 in words is "sixty-six billion, five hundred fifty-five million, one hundred fifty thousand".