61065565 has 16 divisors (see below), whose sum is σ = 80372736. Its totient is φ = 44171200.

The previous prime is 61065559. The next prime is 61065583. The reversal of 61065565 is 56556016.

It is not a de Polignac number, because 61065565 - 2¹⁷ = 60934493 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 61065565.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7599 + ... + 13411.

It is an arithmetic number, because the mean of its divisors is an integer number (5023296).

Almost surely, 2^61065565 is an apocalyptic number.

It is an amenable number.

61065565 is a deficient number, since it is larger than the sum of its proper divisors (19307171).

61065565 is a wasteful number, since it uses less digits than its factorization.

61065565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6020.

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 61065565 is about 7814.4459176579. The cubic root of 61065565 is about 393.7907041149.

The spelling of 61065565 in words is "sixty-one million, sixty-five thousand, five hundred sixty-five".