1666500116 has 6 divisors (see below), whose sum is σ = 2916375210. Its totient is φ = 833250056.

The previous prime is 1666500079. The next prime is 1666500161. The reversal of 1666500116 is 6110056661.

It can be written as a sum of positive squares in only one way, i.e., 1314787600 + 351712516 = 36260^2 + 18754^2 .

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 208312511 + ... + 208312518.

It is an arithmetic number, because the mean of its divisors is an integer number (486062535).

Almost surely, 2^1666500116 is an apocalyptic number.

It is an amenable number.

1666500116 is a deficient number, since it is larger than the sum of its proper divisors (1249875094).

1666500116 is a wasteful number, since it uses less digits than its factorization.

1666500116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416625033 (or 416625031 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 1666500116 is about 40822.7891746755. The cubic root of 1666500116 is about 1185.5916066510.

Adding to 1666500116 its reverse (6110056661), we get a palindrome (7776556777).

The spelling of 1666500116 in words is "one billion, six hundred sixty-six million, five hundred thousand, one hundred sixteen".