666470020000 has 120 divisors (see below), whose sum is σ = 1643724817812. Its totient is φ = 265920000000.

The previous prime is 666470019989. The next prime is 666470020003. The reversal of 666470020000 is 20074666.

666470020000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 10 ways, for example, as 5832682384 + 660637337616 = 76372^2 + 812796^2 .

It is not an unprimeable number, because it can be changed into a prime (666470020003) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7978450 + ... + 8061550.

Almost surely, 2^666470020000 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 666470020000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (821862408906).

666470020000 is an abundant number, since it is smaller than the sum of its proper divisors (977254797812).

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

666470020000 is an equidigital number, since it uses as much as digits as its factorization.

666470020000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83532 (or 83509 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 31.

Adding to 666470020000 its reverse (20074666), we get a palindrome (666490094666).

The spelling of 666470020000 in words is "six hundred sixty-six billion, four hundred seventy million, twenty thousand".