166578345 has 48 divisors (see below), whose sum is σ = 305091072. Its totient is φ = 83946240.

The previous prime is 166578337. The next prime is 166578383. The reversal of 166578345 is 543875661.

It is not a de Polignac number, because 166578345 - 2³ = 166578337 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 166578345.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 58597 + ... + 61373.

It is an arithmetic number, because the mean of its divisors is an integer number (6356064).

Almost surely, 2^166578345 is an apocalyptic number.

166578345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166578345 is a deficient number, since it is larger than the sum of its proper divisors (138512727).

166578345 is a wasteful number, since it uses less digits than its factorization.

166578345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2862 (or 2859 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

The square root of 166578345 is about 12906.5233506162. The cubic root of 166578345 is about 550.2239803998.

The spelling of 166578345 in words is "one hundred sixty-six million, five hundred seventy-eight thousand, three hundred forty-five".