61116665 has 8 divisors (see below), whose sum is σ = 73661640. Its totient is φ = 48678912.

The previous prime is 61116661. The next prime is 61116677. The reversal of 61116665 is 56661116.

61116665 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 40857664 + 20259001 = 6392^2 + 4501^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 61116665 - 2² = 61116661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61116661) by changing a digit.

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, 25544 + ... + 27833.

It is an arithmetic number, because the mean of its divisors is an integer number (9207705).

Almost surely, 2^61116665 is an apocalyptic number.

It is an amenable number.

61116665 is a deficient number, since it is larger than the sum of its proper divisors (12544975).

61116665 is a wasteful number, since it uses less digits than its factorization.

61116665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53611.

The product of its digits is 6480, while the sum is 32.

The square root of 61116665 is about 7817.7148195620. The cubic root of 61116665 is about 393.9005155646.

The spelling of 61116665 in words is "sixty-one million, one hundred sixteen thousand, six hundred sixty-five".