166555372 has 12 divisors (see below), whose sum is σ = 292054896. Its totient is φ = 83111120.

The previous prime is 166555369. The next prime is 166555393. The reversal of 166555372 is 273555661.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39379 + ... + 43402.

It is an arithmetic number, because the mean of its divisors is an integer number (24337908).

Almost surely, 2^166555372 is an apocalyptic number.

It is an amenable number.

166555372 is a deficient number, since it is larger than the sum of its proper divisors (125499524).

166555372 is a wasteful number, since it uses less digits than its factorization.

166555372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83288 (or 83286 counting only the distinct ones).

The product of its digits is 189000, while the sum is 40.

The square root of 166555372 is about 12905.6333436217. The cubic root of 166555372 is about 550.1986852419.

The spelling of 166555372 in words is "one hundred sixty-six million, five hundred fifty-five thousand, three hundred seventy-two".