61106681 has 2 divisors, whose sum is σ = 61106682. Its totient is φ = 61106680.

The previous prime is 61106663. The next prime is 61106701. The reversal of 61106681 is 18660116.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51552400 + 9554281 = 7180^2 + 3091^2 .

It is a cyclic number.

It is not a de Polignac number, because 61106681 - 2²² = 56912377 is a prime.

It is a super-2 number, since 2×61106681² = 7468052925671522, which contains 22 as substring.

It is equal to p_3623933 and since 61106681 and 3623933 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (61106651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30553340 + 30553341.

It is an arithmetic number, because the mean of its divisors is an integer number (30553341).

Almost surely, 2^61106681 is an apocalyptic number.

It is an amenable number.

61106681 is a deficient number, since it is larger than the sum of its proper divisors (1).

61106681 is an equidigital number, since it uses as much as digits as its factorization.

61106681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 61106681 is about 7817.0762437116. The cubic root of 61106681 is about 393.8790652399.

Adding to 61106681 its reverse (18660116), we get a palindrome (79766797).

The spelling of 61106681 in words is "sixty-one million, one hundred six thousand, six hundred eighty-one".