166361378 has 32 divisors (see below), whose sum is σ = 268583040. Its totient is φ = 77051520.

The previous prime is 166361339. The next prime is 166361389. The reversal of 166361378 is 873163661.

166361378 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×166361378² = 55352216180117768, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 531350 + ... + 531662.

It is an arithmetic number, because the mean of its divisors is an integer number (8393220).

Almost surely, 2^166361378 is an apocalyptic number.

166361378 is a deficient number, since it is larger than the sum of its proper divisors (102221662).

166361378 is a wasteful number, since it uses less digits than its factorization.

166361378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602.

The product of its digits is 108864, while the sum is 41.

The square root of 166361378 is about 12898.1152886769. The cubic root of 166361378 is about 549.9849891220.

The spelling of 166361378 in words is "one hundred sixty-six million, three hundred sixty-one thousand, three hundred seventy-eight".