61666761130 has 16 divisors (see below), whose sum is σ = 119538644904. Its totient is φ = 22769265600.

The previous prime is 61666761077. The next prime is 61666761139. The reversal of 61666761130 is 3116766616.

It can be written as a sum of positive squares in 4 ways, for example, as 23253505081 + 38413256049 = 152491^2 + 195993^2 .

It is not an unprimeable number, because it can be changed into a prime (61666761139) 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, 237179721 + ... + 237179980.

Almost surely, 2^61666761130 is an apocalyptic number.

61666761130 is a deficient number, since it is larger than the sum of its proper divisors (57871883774).

61666761130 is a wasteful number, since it uses less digits than its factorization.

61666761130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474359721.

The product of its (nonzero) digits is 163296, while the sum is 43.

The spelling of 61666761130 in words is "sixty-one billion, six hundred sixty-six million, seven hundred sixty-one thousand, one hundred thirty".