166663743 has 8 divisors (see below), whose sum is σ = 227386368. Its totient is φ = 108525144.

The previous prime is 166663741. The next prime is 166663769. The reversal of 166663743 is 347366661.

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

It is not a de Polignac number, because 166663743 - 2¹ = 166663741 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166663695 and 166663704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166663741) 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, 645855 + ... + 646112.

It is an arithmetic number, because the mean of its divisors is an integer number (28423296).

Almost surely, 2^166663743 is an apocalyptic number.

166663743 is a deficient number, since it is larger than the sum of its proper divisors (60722625).

166663743 is a wasteful number, since it uses less digits than its factorization.

166663743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1292013.

The product of its digits is 326592, while the sum is 42.

The square root of 166663743 is about 12909.8312537384. The cubic root of 166663743 is about 550.3179902187.

The spelling of 166663743 in words is "one hundred sixty-six million, six hundred sixty-three thousand, seven hundred forty-three".