5161666 has 8 divisors (see below), whose sum is σ = 7752204. Its totient is φ = 2577600.

The previous prime is 5161643. The next prime is 5161669. The reversal of 5161666 is 6661615.

It can be written as a sum of positive squares in 2 ways, for example, as 5157441 + 4225 = 2271^2 + 65^2 .

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 (5161669) 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, 1966 + ... + 3766.

Almost surely, 2^5161666 is an apocalyptic number.

5161666 is a deficient number, since it is larger than the sum of its proper divisors (2590538).

5161666 is a wasteful number, since it uses less digits than its factorization.

5161666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3236.

The product of its digits is 6480, while the sum is 31.

The square root of 5161666 is about 2271.9300165278. The cubic root of 5161666 is about 172.8210474263.

The spelling of 5161666 in words is "five million, one hundred sixty-one thousand, six hundred sixty-six".