166396078 has 8 divisors (see below), whose sum is σ = 249666840. Its totient is φ = 83173800.

The previous prime is 166396063. The next prime is 166396079. The reversal of 166396078 is 870693661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166396079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1773 + ... + 18328.

It is an arithmetic number, because the mean of its divisors is an integer number (31208355).

Almost surely, 2^166396078 is an apocalyptic number.

166396078 is a deficient number, since it is larger than the sum of its proper divisors (83270762).

166396078 is a wasteful number, since it uses less digits than its factorization.

166396078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24242.

The product of its (nonzero) digits is 326592, while the sum is 46.

The square root of 166396078 is about 12899.4603763103. The cubic root of 166396078 is about 550.0232254655.

The spelling of 166396078 in words is "one hundred sixty-six million, three hundred ninety-six thousand, seventy-eight".