166825757980 has 96 divisors (see below), whose sum is σ = 407390860800. Its totient is φ = 56197178112.

The previous prime is 166825757971. The next prime is 166825757993. The reversal of 166825757980 is 89757528661.

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, 19067967 + ... + 19076713.

It is an arithmetic number, because the mean of its divisors is an integer number (4243654800).

Almost surely, 2^166825757980 is an apocalyptic number.

166825757980 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 166825757980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (203695430400).

166825757980 is an abundant number, since it is smaller than the sum of its proper divisors (240565102820).

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

166825757980 is a wasteful number, since it uses less digits than its factorization.

166825757980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11131 (or 11129 counting only the distinct ones).

The product of its (nonzero) digits is 50803200, while the sum is 64.

The spelling of 166825757980 in words is "one hundred sixty-six billion, eight hundred twenty-five million, seven hundred fifty-seven thousand, nine hundred eighty".