166274385 has 16 divisors (see below), whose sum is σ = 267636096. Its totient is φ = 88147328.

The previous prime is 166274357. The next prime is 166274387. The reversal of 166274385 is 583472661.

It is a cyclic number.

It is not a de Polignac number, because 166274385 - 2⁶ = 166274321 is a prime.

It is a super-2 number, since 2×166274385² = 55294342214256450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (166274387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30684 + ... + 35693.

It is an arithmetic number, because the mean of its divisors is an integer number (16727256).

Almost surely, 2^166274385 is an apocalyptic number.

166274385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166274385 is a deficient number, since it is larger than the sum of its proper divisors (101361711).

166274385 is a wasteful number, since it uses less digits than its factorization.

166274385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66552.

The product of its digits is 241920, while the sum is 42.

The square root of 166274385 is about 12894.7425332963. The cubic root of 166274385 is about 549.8891071195.

It can be divided in two parts, 16627 and 4385, that added together give a palindrome (21012).

The spelling of 166274385 in words is "one hundred sixty-six million, two hundred seventy-four thousand, three hundred eighty-five".