66450389000 has 32 divisors (see below), whose sum is σ = 155493912600. Its totient is φ = 26580155200.

The previous prime is 66450388933. The next prime is 66450389003. The reversal of 66450389000 is 98305466.

It can be written as a sum of positive squares in 4 ways, for example, as 43636703236 + 22813685764 = 208894^2 + 151042^2 .

It is not an unprimeable number, because it can be changed into a prime (66450389003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33224195 + ... + 33226194.

Almost surely, 2^66450389000 is an apocalyptic number.

It is an amenable number.

66450389000 is an abundant number, since it is smaller than the sum of its proper divisors (89043523600).

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

66450389000 is a wasteful number, since it uses less digits than its factorization.

66450389000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66450410 (or 66450396 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 41.

The spelling of 66450389000 in words is "sixty-six billion, four hundred fifty million, three hundred eighty-nine thousand".