61966702941728 has 144 divisors (see below), whose sum is σ = 135659621664000. Its totient is φ = 27840259399680.

The previous prime is 61966702941701. The next prime is 61966702941751. The reversal of 61966702941728 is 82714920766916.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29312048 + ... + 31354896.

It is an arithmetic number, because the mean of its divisors is an integer number (942080706000).

Almost surely, 2^{61966702941728} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61966702941728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67829810832000).

61966702941728 is an abundant number, since it is smaller than the sum of its proper divisors (73692918722272).

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

61966702941728 is a wasteful number, since it uses less digits than its factorization.

61966702941728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2043035 (or 2043014 counting only the distinct ones).

The product of its (nonzero) digits is 109734912, while the sum is 68.

The spelling of 61966702941728 in words is "sixty-one trillion, nine hundred sixty-six billion, seven hundred two million, nine hundred forty-one thousand, seven hundred twenty-eight".