166425270 has 64 divisors (see below), whose sum is σ = 439686144. Its totient is φ = 39979520.

The previous prime is 166425269. The next prime is 166425289. The reversal of 166425270 is 72524661.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 35059 + ... + 39521.

It is an arithmetic number, because the mean of its divisors is an integer number (6870096).

Almost surely, 2^166425270 is an apocalyptic number.

166425270 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 166425270, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (219843072).

166425270 is an abundant number, since it is smaller than the sum of its proper divisors (273260874).

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

166425270 is a wasteful number, since it uses less digits than its factorization.

166425270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4597.

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 166425270 is about 12900.5918468883. The cubic root of 166425270 is about 550.0553883613.

It can be divided in two parts, 16642 and 5270, that added together give a palindrome (21912).

The spelling of 166425270 in words is "one hundred sixty-six million, four hundred twenty-five thousand, two hundred seventy".