166333440000 has 1680 divisors, whose sum is σ = 735156587088. Its totient is φ = 33030144000.

The previous prime is 166333439999. The next prime is 166333440047. The reversal of 166333440000 is 44333661.

It is a tau number, because it is divible by the number of its divisors (1680).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a self number, because there is not a number n which added to its sum of digits gives 166333440000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 9784319992 + ... + 9784320008.

Almost surely, 2^166333440000 is an apocalyptic number.

166333440000 is a gapful number since it is divisible by the number (10) 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 166333440000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (367578293544).

166333440000 is an abundant number, since it is smaller than the sum of its proper divisors (568823147088).

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

166333440000 is an equidigital number, since it uses as much as digits as its factorization.

166333440000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93 (or 47 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 30.

Adding to 166333440000 its reverse (44333661), we get a palindrome (166377773661).

The spelling of 166333440000 in words is "one hundred sixty-six billion, three hundred thirty-three million, four hundred forty thousand".