663036540128 has 24 divisors (see below), whose sum is σ = 1347461357760. Its totient is φ = 320824131840.

The previous prime is 663036540073. The next prime is 663036540139. The reversal of 663036540128 is 821045630366.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 334190813 + ... + 334192796.

It is an arithmetic number, because the mean of its divisors is an integer number (56144223240).

Almost surely, 2^663036540128 is an apocalyptic number.

It is an amenable number.

663036540128 is an abundant number, since it is smaller than the sum of its proper divisors (684424817632).

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

663036540128 is a wasteful number, since it uses less digits than its factorization.

663036540128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668383650 (or 668383642 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 44.

The spelling of 663036540128 in words is "six hundred sixty-three billion, thirty-six million, five hundred forty thousand, one hundred twenty-eight".