166755550 has 48 divisors (see below), whose sum is σ = 353696112. Its totient is φ = 57945600.

The previous prime is 166755527. The next prime is 166755557. The reversal of 166755550 is 55557661.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166755557) 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 23 ways as a sum of consecutive naturals, for example, 3505 + ... + 18595.

It is an arithmetic number, because the mean of its divisors is an integer number (7368669).

Almost surely, 2^166755550 is an apocalyptic number.

166755550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166755550 is an abundant number, since it is smaller than the sum of its proper divisors (186940562).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166755550 is a wasteful number, since it uses less digits than its factorization.

166755550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15133 (or 15128 counting only the distinct ones).

The product of its (nonzero) digits is 157500, while the sum is 40.

The square root of 166755550 is about 12913.3864652151. The cubic root of 166755550 is about 550.4190195303.

The spelling of 166755550 in words is "one hundred sixty-six million, seven hundred fifty-five thousand, five hundred fifty".