166305362550 has 72 divisors (see below), whose sum is σ = 418329993768. Its totient is φ = 43723276800.

The previous prime is 166305362549. The next prime is 166305362563. The reversal of 166305362550 is 55263503661.

166305362550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×166305362550² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 646182 + ... + 866118.

Almost surely, 2^166305362550 is an apocalyptic number.

166305362550 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 166305362550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (209164996884).

166305362550 is an abundant number, since it is smaller than the sum of its proper divisors (252024631218).

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

166305362550 is a wasteful number, since it uses less digits than its factorization.

166305362550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220094 (or 220018 counting only the distinct ones).

The product of its (nonzero) digits is 486000, while the sum is 42.

The spelling of 166305362550 in words is "one hundred sixty-six billion, three hundred five million, three hundred sixty-two thousand, five hundred fifty".