19660697061460 has 144 divisors (see below), whose sum is σ = 51753803124240. Its totient is φ = 6218551664640.

The previous prime is 19660697061443. The next prime is 19660697061479. The reversal of 19660697061460 is 6416079606691.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 6381625811344 + 13279071250116 = 2526188^2 + 3644046^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20800740 + ... + 21725380.

It is an arithmetic number, because the mean of its divisors is an integer number (359401410585).

Almost surely, 2^{19660697061460} is an apocalyptic number.

19660697061460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19660697061460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25876901562120).

19660697061460 is an abundant number, since it is smaller than the sum of its proper divisors (32093106062780).

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

19660697061460 is a wasteful number, since it uses less digits than its factorization.

19660697061460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 926346 (or 926337 counting only the distinct ones).

The product of its (nonzero) digits is 17635968, while the sum is 61.

The spelling of 19660697061460 in words is "nineteen trillion, six hundred sixty billion, six hundred ninety-seven million, sixty-one thousand, four hundred sixty".