3157666 has 4 divisors (see below), whose sum is σ = 4736502. Its totient is φ = 1578832.

The previous prime is 3157657. The next prime is 3157669. The reversal of 3157666 is 6667513.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6667513 = 1697 ⋅3929.

It can be written as a sum of positive squares in only one way, i.e., 2187441 + 970225 = 1479^2 + 985^2 .

It is not an unprimeable number, because it can be changed into a prime (3157669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 789415 + ... + 789418.

Almost surely, 2^3157666 is an apocalyptic number.

3157666 is a deficient number, since it is larger than the sum of its proper divisors (1578836).

3157666 is a wasteful number, since it uses less digits than its factorization.

3157666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1578835.

The product of its digits is 22680, while the sum is 34.

The square root of 3157666 is about 1776.9822734062. The cubic root of 3157666 is about 146.7085406148.

The spelling of 3157666 in words is "three million, one hundred fifty-seven thousand, six hundred sixty-six".