166647881472 has 288 divisors, whose sum is σ = 479929368576. Its totient is φ = 51184742400.

The previous prime is 166647881467. The next prime is 166647881501. The reversal of 166647881472 is 274188746661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 148394703 + ... + 148395825.

Almost surely, 2^166647881472 is an apocalyptic number.

166647881472 is a gapful number since it is divisible by the number (12) 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 166647881472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (239964684288).

166647881472 is an abundant number, since it is smaller than the sum of its proper divisors (313281487104).

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

166647881472 is a wasteful number, since it uses less digits than its factorization.

166647881472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1467 (or 1453 counting only the distinct ones).

The product of its digits is 21676032, while the sum is 60.

The spelling of 166647881472 in words is "one hundred sixty-six billion, six hundred forty-seven million, eight hundred eighty-one thousand, four hundred seventy-two".