166555430 has 8 divisors (see below), whose sum is σ = 299799792. Its totient is φ = 66622168.

The previous prime is 166555393. The next prime is 166555457. The reversal of 166555430 is 34555661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×166555430² = 55481422524969800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 8327762 + ... + 8327781.

It is an arithmetic number, because the mean of its divisors is an integer number (37474974).

Almost surely, 2^166555430 is an apocalyptic number.

166555430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166555430 is a deficient number, since it is larger than the sum of its proper divisors (133244362).

166555430 is a wasteful number, since it uses less digits than its factorization.

166555430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16655550.

The product of its (nonzero) digits is 54000, while the sum is 35.

The square root of 166555430 is about 12905.6355907022. The cubic root of 166555430 is about 550.1987491076.

The spelling of 166555430 in words is "one hundred sixty-six million, five hundred fifty-five thousand, four hundred thirty".