166263380 has 48 divisors (see below), whose sum is σ = 363499920. Its totient is φ = 63802368.

The previous prime is 166263371. The next prime is 166263397. The reversal of 166263380 is 83362661.

It can be written as a sum of positive squares in 8 ways, for example, as 1295044 + 164968336 = 1138^2 + 12844^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 166263380.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99512 + ... + 101168.

It is an arithmetic number, because the mean of its divisors is an integer number (7572915).

Almost surely, 2^166263380 is an apocalyptic number.

166263380 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 166263380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (181749960).

166263380 is an abundant number, since it is smaller than the sum of its proper divisors (197236540).

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

166263380 is a wasteful number, since it uses less digits than its factorization.

166263380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1868 (or 1866 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 166263380 is about 12894.3158019338. The cubic root of 166263380 is about 549.8769752385.

The spelling of 166263380 in words is "one hundred sixty-six million, two hundred sixty-three thousand, three hundred eighty".