61166197 has 2 divisors, whose sum is σ = 61166198. Its totient is φ = 61166196.

The previous prime is 61166123. The next prime is 61166201. The reversal of 61166197 is 79166116.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49014001 + 12152196 = 7001^2 + 3486^2 .

It is a cyclic number.

It is not a de Polignac number, because 61166197 - 2¹¹ = 61164149 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61166297) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30583098 + 30583099.

It is an arithmetic number, because the mean of its divisors is an integer number (30583099).

Almost surely, 2^61166197 is an apocalyptic number.

It is an amenable number.

61166197 is a deficient number, since it is larger than the sum of its proper divisors (1).

61166197 is an equidigital number, since it uses as much as digits as its factorization.

61166197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13608, while the sum is 37.

The square root of 61166197 is about 7820.8821113734. The cubic root of 61166197 is about 394.0068990521.

The spelling of 61166197 in words is "sixty-one million, one hundred sixty-six thousand, one hundred ninety-seven".