166275405 has 12 divisors (see below), whose sum is σ = 288210780. Its totient is φ = 88680192.

The previous prime is 166275401. The next prime is 166275409. The reversal of 166275405 is 504572661.

It is a happy number.

166275405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (166275401) and next prime (166275409).

It can be written as a sum of positive squares in 2 ways, for example, as 70509609 + 95765796 = 8397^2 + 9786^2 .

It is not a de Polignac number, because 166275405 - 2² = 166275401 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166275405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166275401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1847460 + ... + 1847549.

It is an arithmetic number, because the mean of its divisors is an integer number (24017565).

Almost surely, 2^166275405 is an apocalyptic number.

166275405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166275405 is a deficient number, since it is larger than the sum of its proper divisors (121935375).

166275405 is a wasteful number, since it uses less digits than its factorization.

166275405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3695020 (or 3695017 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 166275405 is about 12894.7820842386. The cubic root of 166275405 is about 549.8902315375.

The spelling of 166275405 in words is "one hundred sixty-six million, two hundred seventy-five thousand, four hundred five".