166158406 has 8 divisors (see below), whose sum is σ = 249292584. Its totient is φ = 83060880.

The previous prime is 166158383. The next prime is 166158413. The reversal of 166158406 is 604851661.

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

It is a congruent number.

It is an unprimeable number.

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, 11421 + ... + 21511.

It is an arithmetic number, because the mean of its divisors is an integer number (31161573).

Almost surely, 2^166158406 is an apocalyptic number.

166158406 is a deficient number, since it is larger than the sum of its proper divisors (83134178).

166158406 is a wasteful number, since it uses less digits than its factorization.

166158406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18326.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 166158406 is about 12890.2446059026. The cubic root of 166158406 is about 549.7612252800.

The spelling of 166158406 in words is "one hundred sixty-six million, one hundred fifty-eight thousand, four hundred six".