61065605 has 8 divisors (see below), whose sum is σ = 75066264. Its totient is φ = 47660800.

The previous prime is 61065583. The next prime is 61065647. The reversal of 61065605 is 50656016.

61065605 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 4 ways, for example, as 2067844 + 58997761 = 1438^2 + 7681^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61065605 - 2¹⁰ = 61064581 is a prime.

It is a super-2 number, since 2×61065605² = 7458016228032050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 148736 + ... + 149145.

It is an arithmetic number, because the mean of its divisors is an integer number (9383283).

Almost surely, 2^61065605 is an apocalyptic number.

It is an amenable number.

61065605 is a deficient number, since it is larger than the sum of its proper divisors (14000659).

61065605 is a wasteful number, since it uses less digits than its factorization.

61065605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297927.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 61065605 is about 7814.4484770200. The cubic root of 61065605 is about 393.7907900969.

It can be divided in two parts, 6106 and 5605, that added together give a palindrome (11711).

The spelling of 61065605 in words is "sixty-one million, sixty-five thousand, six hundred five".