6661554020352 has 1344 divisors, whose sum is σ = 25431281095680. Its totient is φ = 1703736115200.

The previous prime is 6661554020321. The next prime is 6661554020383. The reversal of 6661554020352 is 2530204551666.

It is an interprime number because it is at equal distance from previous prime (6661554020321) and next prime (6661554020383).

It is a tau number, because it is divible by the number of its divisors (1344).

It is a junction number, because it is equal to n+sod(n) for n = 6661554020298 and 6661554020307.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 8464490103 + ... + 8464490889.

Almost surely, 2^{6661554020352} 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 6661554020352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12715640547840).

6661554020352 is an abundant number, since it is smaller than the sum of its proper divisors (18769727075328).

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

6661554020352 is a wasteful number, since it uses less digits than its factorization.

6661554020352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 918 (or 881 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 45.

The spelling of 6661554020352 in words is "six trillion, six hundred sixty-one billion, five hundred fifty-four million, twenty thousand, three hundred fifty-two".