166670784000 has 960 divisors, whose sum is σ = 711951432192. Its totient is φ = 38071296000.

The previous prime is 166670783963. The next prime is 166670784017. The reversal of 166670784000 is 487076661.

It is a tau number, because it is divible by the number of its divisors (960).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 108863235 + ... + 108864765.

Almost surely, 2^166670784000 is an apocalyptic number.

166670784000 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 166670784000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (355975716096).

166670784000 is an abundant number, since it is smaller than the sum of its proper divisors (545280648192).

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

166670784000 is an frugal number, since it uses more digits than its factorization.

166670784000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1586 (or 1548 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The spelling of 166670784000 in words is "one hundred sixty-six billion, six hundred seventy million, seven hundred eighty-four thousand".