168266138 has 8 divisors (see below), whose sum is σ = 258269088. Its totient is φ = 82176444.

The previous prime is 168266123. The next prime is 168266141. The reversal of 168266138 is 831662861.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 168266095 and 168266104.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 978206 + ... + 978377.

It is an arithmetic number, because the mean of its divisors is an integer number (32283636).

Almost surely, 2^168266138 is an apocalyptic number.

168266138 is a deficient number, since it is larger than the sum of its proper divisors (90002950).

168266138 is a wasteful number, since it uses less digits than its factorization.

168266138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1956628.

The product of its digits is 82944, while the sum is 41.

The square root of 168266138 is about 12971.7438303414. The cubic root of 168266138 is about 552.0760524108.

The spelling of 168266138 in words is "one hundred sixty-eight million, two hundred sixty-six thousand, one hundred thirty-eight".