61660769782 has 16 divisors (see below), whose sum is σ = 97596925920. Its totient is φ = 29158583872.

The previous prime is 61660769747. The next prime is 61660769809. The reversal of 61660769782 is 28796706616.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7526533 + ... + 7534720.

It is an arithmetic number, because the mean of its divisors is an integer number (6099807870).

Almost surely, 2^61660769782 is an apocalyptic number.

61660769782 is a deficient number, since it is larger than the sum of its proper divisors (35936156138).

61660769782 is a wasteful number, since it uses less digits than its factorization.

61660769782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15061367.

The product of its (nonzero) digits is 9144576, while the sum is 58.

The spelling of 61660769782 in words is "sixty-one billion, six hundred sixty million, seven hundred sixty-nine thousand, seven hundred eighty-two".