61000065 has 48 divisors (see below), whose sum is σ = 121575168. Its totient is φ = 27715968.

The previous prime is 61000039. The next prime is 61000091. The reversal of 61000065 is 56000016.

It is an interprime number because it is at equal distance from previous prime (61000039) and next prime (61000091).

It is not a de Polignac number, because 61000065 - 2⁶ = 61000001 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 61564 + ... + 62546.

It is an arithmetic number, because the mean of its divisors is an integer number (2532816).

Almost surely, 2^61000065 is an apocalyptic number.

It is an amenable number.

61000065 is a deficient number, since it is larger than the sum of its proper divisors (60575103).

61000065 is a wasteful number, since it uses less digits than its factorization.

61000065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1198 (or 1195 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 61000065 is about 7810.2538371041. The cubic root of 61000065 is about 393.6498581311.

The spelling of 61000065 in words is "sixty-one million, sixty-five", and thus it is an aban number and an uban number.