166793989050 has 240 divisors, whose sum is σ = 512584322712. Its totient is φ = 39946867200.

The previous prime is 166793989049. The next prime is 166793989067. The reversal of 166793989050 is 50989397661.

It can be written as a sum of positive squares in 12 ways, for example, as 44394068601 + 122399920449 = 210699^2 + 349857^2 .

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, 1905240 + ... + 1990860.

Almost surely, 2^166793989050 is an apocalyptic number.

166793989050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 166793989050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (256292161356).

166793989050 is an abundant number, since it is smaller than the sum of its proper divisors (345790333662).

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

166793989050 is a wasteful number, since it uses less digits than its factorization.

166793989050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85695 (or 85681 counting only the distinct ones).

The product of its (nonzero) digits is 22044960, while the sum is 63.

The spelling of 166793989050 in words is "one hundred sixty-six billion, seven hundred ninety-three million, nine hundred eighty-nine thousand, fifty".