666261662030048 has 96 divisors (see below), whose sum is σ = 1507568681203200. Its totient is φ = 283925707881984.

The previous prime is 666261662030047. The next prime is 666261662030053. The reversal of 666261662030048 is 840030266162666.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a junction number, because it is equal to n+sod(n) for n = 666261662029975 and 666261662030002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666261662030047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 581581586 + ... + 582726062.

It is an arithmetic number, because the mean of its divisors is an integer number (15703840429200).

Almost surely, 2^{666261662030048} 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 666261662030048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (753784340601600).

666261662030048 is an abundant number, since it is smaller than the sum of its proper divisors (841307019173152).

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

666261662030048 is a wasteful number, since it uses less digits than its factorization.

666261662030048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1159192 (or 1159184 counting only the distinct ones).

The product of its (nonzero) digits is 17915904, while the sum is 56.

The spelling of 666261662030048 in words is "six hundred sixty-six trillion, two hundred sixty-one billion, six hundred sixty-two million, thirty thousand, forty-eight".