166319409 has 8 divisors (see below), whose sum is σ = 223832160. Its totient is φ = 109843136.

The previous prime is 166319339. The next prime is 166319429. The reversal of 166319409 is 904913661.

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

It is a cyclic number.

It is not a de Polignac number, because 166319409 - 2⁷ = 166319281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166319429) 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, 258744 + ... + 259385.

It is an arithmetic number, because the mean of its divisors is an integer number (27979020).

Almost surely, 2^166319409 is an apocalyptic number.

It is an amenable number.

166319409 is a deficient number, since it is larger than the sum of its proper divisors (57512751).

166319409 is a wasteful number, since it uses less digits than its factorization.

166319409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518239.

The product of its (nonzero) digits is 34992, while the sum is 39.

The square root of 166319409 is about 12896.4882429288. The cubic root of 166319409 is about 549.9387358758.

The spelling of 166319409 in words is "one hundred sixty-six million, three hundred nineteen thousand, four hundred nine".