166541427 has 40 divisors (see below), whose sum is σ = 270565680. Its totient is φ = 101476800.

The previous prime is 166541399. The next prime is 166541429. The reversal of 166541427 is 724145661.

It is not a de Polignac number, because 166541427 - 2¹⁰ = 166540403 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166541391 and 166541400.

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 39 ways as a sum of consecutive naturals, for example, 114052 + ... + 115502.

It is an arithmetic number, because the mean of its divisors is an integer number (6764142).

Almost surely, 2^166541427 is an apocalyptic number.

166541427 is a deficient number, since it is larger than the sum of its proper divisors (104024253).

166541427 is a wasteful number, since it uses less digits than its factorization.

166541427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1585 (or 1576 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 166541427 is about 12905.0930643680. The cubic root of 166541427 is about 550.1833295183.

It can be divided in two parts, 16654 and 1427, that added together give a palindrome (18081).

The spelling of 166541427 in words is "one hundred sixty-six million, five hundred forty-one thousand, four hundred twenty-seven".