4157666 has 8 divisors (see below), whose sum is σ = 6252204. Its totient is φ = 2073600.

The previous prime is 4157663. The next prime is 4157669. The reversal of 4157666 is 6667514.

It is an interprime number because it is at equal distance from previous prime (4157663) and next prime (4157669).

It can be written as a sum of positive squares in 2 ways, for example, as 4020025 + 137641 = 2005^2 + 371^2 .

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

It is not an unprimeable number, because it can be changed into a prime (4157663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1535 + ... + 3266.

Almost surely, 2^4157666 is an apocalyptic number.

4157666 is a deficient number, since it is larger than the sum of its proper divisors (2094538).

4157666 is a wasteful number, since it uses less digits than its factorization.

4157666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5236.

The product of its digits is 30240, while the sum is 35.

The square root of 4157666 is about 2039.0355563354. The cubic root of 4157666 is about 160.7989465951.

The spelling of 4157666 in words is "four million, one hundred fifty-seven thousand, six hundred sixty-six".