166665346 has 4 divisors (see below), whose sum is σ = 249998022. Its totient is φ = 83332672.

The previous prime is 166665319. The next prime is 166665347. The reversal of 166665346 is 643566661.

166665346 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 643566661 = 10289 ⋅62549.

It can be written as a sum of positive squares in only one way, i.e., 111534721 + 55130625 = 10561^2 + 7425^2 .

It is not an unprimeable number, because it can be changed into a prime (166665347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41666335 + ... + 41666338.

Almost surely, 2^166665346 is an apocalyptic number.

166665346 is a deficient number, since it is larger than the sum of its proper divisors (83332676).

166665346 is an equidigital number, since it uses as much as digits as its factorization.

166665346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83332675.

The product of its digits is 466560, while the sum is 43.

The square root of 166665346 is about 12909.8933380567. The cubic root of 166665346 is about 550.3197545635.

The spelling of 166665346 in words is "one hundred sixty-six million, six hundred sixty-five thousand, three hundred forty-six".