61166645 has 8 divisors (see below), whose sum is σ = 74495904. Its totient is φ = 48202704.

The previous prime is 61166641. The next prime is 61166647. The reversal of 61166645 is 54666116.

61166645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 61166645 - 2² = 61166641 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61166641) 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, 90959 + ... + 91628.

It is an arithmetic number, because the mean of its divisors is an integer number (9311988).

Almost surely, 2^61166645 is an apocalyptic number.

It is an amenable number.

61166645 is a deficient number, since it is larger than the sum of its proper divisors (13329259).

61166645 is a wasteful number, since it uses less digits than its factorization.

61166645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182659.

The product of its digits is 25920, while the sum is 35.

The square root of 61166645 is about 7820.9107525914. The cubic root of 61166645 is about 394.0078609922.

The spelling of 61166645 in words is "sixty-one million, one hundred sixty-six thousand, six hundred forty-five".