166756731648 has 288 divisors, whose sum is σ = 498000814080. Its totient is φ = 49189109760.

The previous prime is 166756731629. The next prime is 166756731671. The reversal of 166756731648 is 846137657661.

It is a junction number, because it is equal to n+sod(n) for n = 166756731591 and 166756731600.

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, 33733465 + ... + 33738407.

Almost surely, 2^166756731648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166756731648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (249000407040).

166756731648 is an abundant number, since it is smaller than the sum of its proper divisors (331244082432).

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

166756731648 is a wasteful number, since it uses less digits than its factorization.

166756731648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5115 (or 5101 counting only the distinct ones).

The product of its digits is 30481920, while the sum is 60.

The spelling of 166756731648 in words is "one hundred sixty-six billion, seven hundred fifty-six million, seven hundred thirty-one thousand, six hundred forty-eight".