61665960236 has 12 divisors (see below), whose sum is σ = 107917545120. Its totient is φ = 30832375920.

The previous prime is 61665960233. The next prime is 61665960287. The reversal of 61665960236 is 63206956616.

It is not an unprimeable number, because it can be changed into a prime (61665960233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141581 + ... + 378651.

It is an arithmetic number, because the mean of its divisors is an integer number (8993128760).

Almost surely, 2^61665960236 is an apocalyptic number.

It is an amenable number.

61665960236 is a deficient number, since it is larger than the sum of its proper divisors (46251584884).

61665960236 is a wasteful number, since it uses less digits than its factorization.

61665960236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302104 (or 302102 counting only the distinct ones).

The product of its (nonzero) digits is 2099520, while the sum is 50.

The spelling of 61665960236 in words is "sixty-one billion, six hundred sixty-five million, nine hundred sixty thousand, two hundred thirty-six".