61660303873 has 16 divisors (see below), whose sum is σ = 72426714624. Its totient is φ = 51397669440.

The previous prime is 61660303853. The next prime is 61660303909. The reversal of 61660303873 is 37830306616.

It is a cyclic number.

It is not a de Polignac number, because 61660303873 - 2²¹ = 61658206721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61660303813) 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 15 ways as a sum of consecutive naturals, for example, 545218 + ... + 648523.

It is an arithmetic number, because the mean of its divisors is an integer number (4526669664).

Almost surely, 2^61660303873 is an apocalyptic number.

It is an amenable number.

61660303873 is a deficient number, since it is larger than the sum of its proper divisors (10766410751).

61660303873 is a wasteful number, since it uses less digits than its factorization.

61660303873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1193952.

The product of its (nonzero) digits is 326592, while the sum is 43.

The spelling of 61660303873 in words is "sixty-one billion, six hundred sixty million, three hundred three thousand, eight hundred seventy-three".