166626393 has 8 divisors (see below), whose sum is σ = 222841056. Its totient is φ = 110748000.

The previous prime is 166626379. The next prime is 166626451. The reversal of 166626393 is 393626661.

166626393 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 166626393 - 2¹⁰ = 166625369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166626323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82908 + ... + 84893.

It is an arithmetic number, because the mean of its divisors is an integer number (27855132).

Almost surely, 2^166626393 is an apocalyptic number.

It is an amenable number.

166626393 is a deficient number, since it is larger than the sum of its proper divisors (56214663).

166626393 is a wasteful number, since it uses less digits than its factorization.

166626393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168135.

The product of its digits is 209952, while the sum is 42.

The square root of 166626393 is about 12908.3846007159. The cubic root of 166626393 is about 550.2768776724.

The spelling of 166626393 in words is "one hundred sixty-six million, six hundred twenty-six thousand, three hundred ninety-three".