166426155 has 48 divisors (see below), whose sum is σ = 330670080. Its totient is φ = 75852864.

The previous prime is 166426151. The next prime is 166426159. The reversal of 166426155 is 551624661.

166426155 is a `hidden beast` number, since 1 + 6 + 642 + 6 + 1 + 5 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (166426151) and next prime (166426159).

It is not a de Polignac number, because 166426155 - 2² = 166426151 is a prime.

Its product of digits (43200) is a multiple of the sum of its prime factors (1600).

It is not an unprimeable number, because it can be changed into a prime (166426151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 150334 + ... + 151436.

It is an arithmetic number, because the mean of its divisors is an integer number (6888960).

Almost surely, 2^166426155 is an apocalyptic number.

166426155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

166426155 is a deficient number, since it is larger than the sum of its proper divisors (164243925).

166426155 is a wasteful number, since it uses less digits than its factorization.

166426155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1600 (or 1597 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 166426155 is about 12900.6261475945. The cubic root of 166426155 is about 550.0563633698.

The spelling of 166426155 in words is "one hundred sixty-six million, four hundred twenty-six thousand, one hundred fifty-five".