166616347 has 4 divisors (see below), whose sum is σ = 173860560. Its totient is φ = 159372136.

The previous prime is 166616323. The next prime is 166616399. The reversal of 166616347 is 743616661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166616347 is a prime.

It is a super-2 number, since 2×166616347² = 55522014175248818, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166616647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3622072 + ... + 3622117.

It is an arithmetic number, because the mean of its divisors is an integer number (43465140).

Almost surely, 2^166616347 is an apocalyptic number.

166616347 is a deficient number, since it is larger than the sum of its proper divisors (7244213).

166616347 is an equidigital number, since it uses as much as digits as its factorization.

166616347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7244212.

The product of its digits is 108864, while the sum is 40.

The square root of 166616347 is about 12907.9954679261. The cubic root of 166616347 is about 550.2658186149.

The spelling of 166616347 in words is "one hundred sixty-six million, six hundred sixteen thousand, three hundred forty-seven".