166541426 has 16 divisors (see below), whose sum is σ = 256312728. Its totient is φ = 81110400.

The previous prime is 166541399. The next prime is 166541429. The reversal of 166541426 is 624145661.

It can be written as a sum of positive squares in 4 ways, for example, as 9916201 + 156625225 = 3149^2 + 12515^2 .

It is a super-2 number, since 2×166541426² = 55472093148226952, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (166541429) 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, 68756 + ... + 71136.

Almost surely, 2^166541426 is an apocalyptic number.

166541426 is a deficient number, since it is larger than the sum of its proper divisors (89771302).

166541426 is a wasteful number, since it uses less digits than its factorization.

166541426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3277.

The product of its digits is 34560, while the sum is 35.

The square root of 166541426 is about 12905.0930256236. The cubic root of 166541426 is about 550.1833284171.

The spelling of 166541426 in words is "one hundred sixty-six million, five hundred forty-one thousand, four hundred twenty-six".