166661010 has 64 divisors (see below), whose sum is σ = 445680000. Its totient is φ = 44318016.

The previous prime is 166660969. The next prime is 166661029. The reversal of 166661010 is 10166661.

166661010 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 134112 + ... + 135348.

It is an arithmetic number, because the mean of its divisors is an integer number (6963750).

Almost surely, 2^166661010 is an apocalyptic number.

166661010 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 166661010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222840000).

166661010 is an abundant number, since it is smaller than the sum of its proper divisors (279018990).

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

166661010 is a wasteful number, since it uses less digits than its factorization.

166661010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1752 (or 1746 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 166661010 is about 12909.7254037412. The cubic root of 166661010 is about 550.3149821114.

The spelling of 166661010 in words is "one hundred sixty-six million, six hundred sixty-one thousand, ten".