166426280 has 32 divisors (see below), whose sum is σ = 376858440. Its totient is φ = 66144000.

The previous prime is 166426279. The next prime is 166426283. The reversal of 166426280 is 82624661.

It can be written as a sum of positive squares in 4 ways, for example, as 105555076 + 60871204 = 10274^2 + 7802^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 166426280.

It is not an unprimeable number, because it can be changed into a prime (166426283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6971 + ... + 19530.

Almost surely, 2^166426280 is an apocalyptic number.

166426280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166426280 is an abundant number, since it is smaller than the sum of its proper divisors (210432160).

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

166426280 is a wasteful number, since it uses less digits than its factorization.

166426280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26669 (or 26665 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 166426280 is about 12900.6309923197. The cubic root of 166426280 is about 550.0565010825.

It can be divided in two parts, 16642 and 6280, that added together give a palindrome (22922).

The spelling of 166426280 in words is "one hundred sixty-six million, four hundred twenty-six thousand, two hundred eighty".