61550666061 has 8 divisors (see below), whose sum is σ = 82238887680. Its totient is φ = 40948110912.

The previous prime is 61550666039. The next prime is 61550666071. The reversal of 61550666061 is 16066605516.

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

It is not a de Polignac number, because 61550666061 - 2⁶ = 61550665997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61550666071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21414940 + ... + 21417813.

It is an arithmetic number, because the mean of its divisors is an integer number (10279860960).

Almost surely, 2^61550666061 is an apocalyptic number.

It is an amenable number.

61550666061 is a deficient number, since it is larger than the sum of its proper divisors (20688221619).

61550666061 is a wasteful number, since it uses less digits than its factorization.

61550666061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42833235.

The product of its (nonzero) digits is 194400, while the sum is 42.

The spelling of 61550666061 in words is "sixty-one billion, five hundred fifty million, six hundred sixty-six thousand, sixty-one".