8948666637520 has 20 divisors (see below), whose sum is σ = 20805649932420. Its totient is φ = 3579466654976.

The previous prime is 8948666637481. The next prime is 8948666637529. The reversal of 8948666637520 is 257366668498.

It can be written as a sum of positive squares in 2 ways, for example, as 2575626975376 + 6373039662144 = 1604876^2 + 2524488^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 8948666637520.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8948666637529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55929166405 + ... + 55929166564.

It is an arithmetic number, because the mean of its divisors is an integer number (1040282496621).

Almost surely, 2^{8948666637520} is an apocalyptic number.

8948666637520 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8948666637520 is an abundant number, since it is smaller than the sum of its proper divisors (11856983294900).

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

8948666637520 is a wasteful number, since it uses less digits than its factorization.

8948666637520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111858332982 (or 111858332976 counting only the distinct ones).

The product of its (nonzero) digits is 627056640, while the sum is 70.

The spelling of 8948666637520 in words is "eight trillion, nine hundred forty-eight billion, six hundred sixty-six million, six hundred thirty-seven thousand, five hundred twenty".