166404355 has 16 divisors (see below), whose sum is σ = 220860864. Its totient is φ = 119560320.

The previous prime is 166404353. The next prime is 166404361. The reversal of 166404355 is 553404661.

It is not a de Polignac number, because 166404355 - 2¹ = 166404353 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 166404355.

It is not an unprimeable number, because it can be changed into a prime (166404353) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32191 + ... + 37000.

It is an arithmetic number, because the mean of its divisors is an integer number (13803804).

Almost surely, 2^166404355 is an apocalyptic number.

166404355 is a deficient number, since it is larger than the sum of its proper divisors (54456509).

166404355 is a wasteful number, since it uses less digits than its factorization.

166404355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69246.

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 166404355 is about 12899.7811996948. The cubic root of 166404355 is about 550.0323452052.

The spelling of 166404355 in words is "one hundred sixty-six million, four hundred four thousand, three hundred fifty-five".