166498642026 has 48 divisors (see below), whose sum is σ = 370815108768. Its totient is φ = 53953192800.

The previous prime is 166498642001. The next prime is 166498642033. The reversal of 166498642026 is 620246894661.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 673141 + ... + 886631.

It is an arithmetic number, because the mean of its divisors is an integer number (7725314766).

Almost surely, 2^166498642026 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166498642026, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (185407554384).

166498642026 is an abundant number, since it is smaller than the sum of its proper divisors (204316466742).

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

166498642026 is a wasteful number, since it uses less digits than its factorization.

166498642026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214707 (or 214704 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 54.

The spelling of 166498642026 in words is "one hundred sixty-six billion, four hundred ninety-eight million, six hundred forty-two thousand, twenty-six".