166696438 has 8 divisors (see below), whose sum is σ = 250164288. Its totient is φ = 83308344.

The previous prime is 166696403. The next prime is 166696459. The reversal of 166696438 is 834696661.

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

It is a super-3 number, since 3×166696438³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 166696391 and 166696400.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14406 + ... + 23257.

It is an arithmetic number, because the mean of its divisors is an integer number (31270536).

Almost surely, 2^166696438 is an apocalyptic number.

166696438 is a deficient number, since it is larger than the sum of its proper divisors (83467850).

166696438 is a wasteful number, since it uses less digits than its factorization.

166696438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39878.

The product of its digits is 1119744, while the sum is 49.

The square root of 166696438 is about 12911.0974746533. The cubic root of 166696438 is about 550.3539737905.

The spelling of 166696438 in words is "one hundred sixty-six million, six hundred ninety-six thousand, four hundred thirty-eight".