61665655015716 has 48 divisors (see below), whose sum is σ = 144309044140800. Its totient is φ = 20494887028992.

The previous prime is 61665655015709. The next prime is 61665655015739. The reversal of 61665655015716 is 61751055656616.

It is a self number, because there is not a number n which added to its sum of digits gives 61665655015716.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15832965 + ... + 19339443.

It is an arithmetic number, because the mean of its divisors is an integer number (3006438419600).

Almost surely, 2^{61665655015716} is an apocalyptic number.

It is an amenable number.

61665655015716 is an abundant number, since it is smaller than the sum of its proper divisors (82643389125084).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61665655015716 is a wasteful number, since it uses less digits than its factorization.

61665655015716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3510788 (or 3510786 counting only the distinct ones).

The product of its (nonzero) digits is 34020000, while the sum is 60.

The spelling of 61665655015716 in words is "sixty-one trillion, six hundred sixty-five billion, six hundred fifty-five million, fifteen thousand, seven hundred sixteen".