61544166 has 8 divisors (see below), whose sum is σ = 123088344. Its totient is φ = 20514720.

The previous prime is 61544143. The next prime is 61544191. The reversal of 61544166 is 66144516.

It is a happy number.

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

61544166 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5128675 + ... + 5128686.

It is an arithmetic number, because the mean of its divisors is an integer number (15386043).

Almost surely, 2^61544166 is an apocalyptic number.

61544166 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

61544166 is a wasteful number, since it uses less digits than its factorization.

61544166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10257366.

The product of its digits is 17280, while the sum is 33.

The square root of 61544166 is about 7845.0089866105. The cubic root of 61544166 is about 394.8168055061.

The spelling of 61544166 in words is "sixty-one million, five hundred forty-four thousand, one hundred sixty-six".