668055367548 has 18 divisors (see below), whose sum is σ = 1688695512504. Its totient is φ = 222685122504.

The previous prime is 668055367547. The next prime is 668055367549. The reversal of 668055367548 is 845763550866.

668055367548 is a `hidden beast` number, since 6 + 6 + 8 + 0 + 55 + 36 + 7 + 548 = 666.

It is an interprime number because it is at equal distance from previous prime (668055367547) and next prime (668055367549).

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668055367541) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9278546736 + ... + 9278546807.

Almost surely, 2^668055367548 is an apocalyptic number.

It is an amenable number.

668055367548 is an abundant number, since it is smaller than the sum of its proper divisors (1020640144956).

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

668055367548 is a wasteful number, since it uses less digits than its factorization.

668055367548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18557093553 (or 18557093548 counting only the distinct ones).

The product of its (nonzero) digits is 145152000, while the sum is 63.

The spelling of 668055367548 in words is "six hundred sixty-eight billion, fifty-five million, three hundred sixty-seven thousand, five hundred forty-eight".