166981441480 has 256 divisors, whose sum is σ = 468809280000. Its totient is φ = 53343360000.

The previous prime is 166981441453. The next prime is 166981441481. The reversal of 166981441480 is 84144189661.

It is not an unprimeable number, because it can be changed into a prime (166981441481) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 15896230 + ... + 15906730.

It is an arithmetic number, because the mean of its divisors is an integer number (1831286250).

Almost surely, 2^166981441480 is an apocalyptic number.

166981441480 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 166981441480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (234404640000).

166981441480 is an abundant number, since it is smaller than the sum of its proper divisors (301827838520).

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

166981441480 is a wasteful number, since it uses less digits than its factorization.

166981441480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10613 (or 10595 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 52.

The spelling of 166981441480 in words is "one hundred sixty-six billion, nine hundred eighty-one million, four hundred forty-one thousand, four hundred eighty".