66116125 has 8 divisors (see below), whose sum is σ = 82513080. Its totient is φ = 52892800.

The previous prime is 66116119. The next prime is 66116227. The reversal of 66116125 is 52161166.

It can be written as a sum of positive squares in 4 ways, for example, as 1522756 + 64593369 = 1234^2 + 8037^2 .

It is not a de Polignac number, because 66116125 - 2³ = 66116117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66116093 and 66116102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 264340 + ... + 264589.

It is an arithmetic number, because the mean of its divisors is an integer number (10314135).

Almost surely, 2^66116125 is an apocalyptic number.

It is an amenable number.

66116125 is a deficient number, since it is larger than the sum of its proper divisors (16396955).

66116125 is an equidigital number, since it uses as much as digits as its factorization.

66116125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528944 (or 528934 counting only the distinct ones).

The product of its digits is 2160, while the sum is 28.

The square root of 66116125 is about 8131.1822633612. The cubic root of 66116125 is about 404.3608778364.

The spelling of 66116125 in words is "sixty-six million, one hundred sixteen thousand, one hundred twenty-five".