61166646 has 48 divisors (see below), whose sum is σ = 143342784. Its totient is φ = 18776832.

The previous prime is 61166641. The next prime is 61166647. The reversal of 61166646 is 64666116.

61166646 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 61166646.

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 23 ways as a sum of consecutive naturals, for example, 12256 + ... + 16508.

It is an arithmetic number, because the mean of its divisors is an integer number (2986308).

Almost surely, 2^61166646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61166646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71671392).

61166646 is an abundant number, since it is smaller than the sum of its proper divisors (82176138).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61166646 is a wasteful number, since it uses less digits than its factorization.

61166646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4325 (or 4322 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 61166646 is about 7820.9108165226. The cubic root of 61166646 is about 394.0078631394.

The spelling of 61166646 in words is "sixty-one million, one hundred sixty-six thousand, six hundred forty-six".