166673407 has 4 divisors (see below), whose sum is σ = 169498440. Its totient is φ = 163848376.

The previous prime is 166673383. The next prime is 166673443. The reversal of 166673407 is 704376661.

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

It is a cyclic number.

It is not a de Polignac number, because 166673407 - 2⁷ = 166673279 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 166673407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166673447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1412428 + ... + 1412545.

It is an arithmetic number, because the mean of its divisors is an integer number (42374610).

Almost surely, 2^166673407 is an apocalyptic number.

166673407 is a deficient number, since it is larger than the sum of its proper divisors (2825033).

166673407 is an equidigital number, since it uses as much as digits as its factorization.

166673407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2825032.

The product of its (nonzero) digits is 127008, while the sum is 40.

The square root of 166673407 is about 12910.2055367062. The cubic root of 166673407 is about 550.3286267459.

The spelling of 166673407 in words is "one hundred sixty-six million, six hundred seventy-three thousand, four hundred seven".