61166117 has 4 divisors (see below), whose sum is σ = 61202316. Its totient is φ = 61129920.

The previous prime is 61166059. The next prime is 61166123. The reversal of 61166117 is 71166116.

61166117 is nontrivially palindromic in base 13.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 48874081 + 12292036 = 6991^2 + 3506^2 .

It is a cyclic number.

It is not a de Polignac number, because 61166117 - 2¹² = 61162021 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61166117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61166197) 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, 15434 + ... + 18987.

It is an arithmetic number, because the mean of its divisors is an integer number (15300579).

Almost surely, 2^61166117 is an apocalyptic number.

It is an amenable number.

61166117 is a deficient number, since it is larger than the sum of its proper divisors (36199).

61166117 is a wasteful number, since it uses less digits than its factorization.

61166117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36198.

The product of its digits is 1512, while the sum is 29.

The square root of 61166117 is about 7820.8769968591. The cubic root of 61166117 is about 394.0067272765.

Subtracting 61166117 from its reverse (71166116), we obtain a palindrome (9999999).

The spelling of 61166117 in words is "sixty-one million, one hundred sixty-six thousand, one hundred seventeen".