166822516980 has 384 divisors, whose sum is σ = 609769036800. Its totient is φ = 37075304448.

The previous prime is 166822516943. The next prime is 166822517009. The reversal of 166822516980 is 89615228661.

166822516980 is a `hidden beast` number, since 16 + 6 + 8 + 22 + 516 + 98 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 22634736 + ... + 22642104.

It is an arithmetic number, because the mean of its divisors is an integer number (1587940200).

Almost surely, 2^166822516980 is an apocalyptic number.

166822516980 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 166822516980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (304884518400).

166822516980 is an abundant number, since it is smaller than the sum of its proper divisors (442946519820).

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

166822516980 is a wasteful number, since it uses less digits than its factorization.

166822516980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7560 (or 7552 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 54.

The spelling of 166822516980 in words is "one hundred sixty-six billion, eight hundred twenty-two million, five hundred sixteen thousand, nine hundred eighty".