61330865 has 16 divisors (see below), whose sum is σ = 77054976. Its totient is φ = 46804800.

The previous prime is 61330861. The next prime is 61330873. The reversal of 61330865 is 56803316.

It is not a de Polignac number, because 61330865 - 2² = 61330861 is a prime.

It is a super-2 number, since 2×61330865² = 7522950003296450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61330861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8219 + ... + 13791.

It is an arithmetic number, because the mean of its divisors is an integer number (4815936).

Almost surely, 2^61330865 is an apocalyptic number.

It is an amenable number.

61330865 is a deficient number, since it is larger than the sum of its proper divisors (15724111).

61330865 is a wasteful number, since it uses less digits than its factorization.

61330865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5680.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 61330865 is about 7831.4024925297. The cubic root of 61330865 is about 394.3601562204.

The spelling of 61330865 in words is "sixty-one million, three hundred thirty thousand, eight hundred sixty-five".