166126378 has 32 divisors (see below), whose sum is σ = 284653440. Its totient is φ = 71976960.

The previous prime is 166126369. The next prime is 166126379. The reversal of 166126378 is 873621661.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 166126378.

It is not an unprimeable number, because it can be changed into a prime (166126379) 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, 287626 + ... + 288202.

It is an arithmetic number, because the mean of its divisors is an integer number (8895420).

Almost surely, 2^166126378 is an apocalyptic number.

166126378 is a deficient number, since it is larger than the sum of its proper divisors (118527062).

166126378 is a wasteful number, since it uses less digits than its factorization.

166126378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1182.

The product of its digits is 72576, while the sum is 40.

The square root of 166126378 is about 12889.0022111876. The cubic root of 166126378 is about 549.7258997846.

The spelling of 166126378 in words is "one hundred sixty-six million, one hundred twenty-six thousand, three hundred seventy-eight".