61166025 has 18 divisors (see below), whose sum is σ = 109555550. Its totient is φ = 32621760.

The previous prime is 61166011. The next prime is 61166047. The reversal of 61166025 is 52066116.

It is a happy number.

61166025 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 746496 + 60419529 = 864^2 + 7773^2 .

It is not a de Polignac number, because 61166025 - 2⁶ = 61165961 is a prime.

It is a super-2 number, since 2×61166025² = 7482565228601250, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61166025.

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 in 17 ways as a sum of consecutive naturals, for example, 135700 + ... + 136149.

Almost surely, 2^61166025 is an apocalyptic number.

It is an amenable number.

61166025 is a deficient number, since it is larger than the sum of its proper divisors (48389525).

61166025 is a wasteful number, since it uses less digits than its factorization.

61166025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271865 (or 271857 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 61166025 is about 7820.8711151636. The cubic root of 61166025 is about 394.0065297345.

Subtracting from 61166025 its reverse (52066116), we obtain a palindrome (9099909).

The spelling of 61166025 in words is "sixty-one million, one hundred sixty-six thousand, twenty-five".