67755511666464 has 48 divisors (see below), whose sum is σ = 183991260136320. Its totient is φ = 21806371569920.

The previous prime is 67755511666459. The next prime is 67755511666607. The reversal of 67755511666464 is 46466611555776.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×67755511666464² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12168731352 + ... + 12168736919.

It is an arithmetic number, because the mean of its divisors is an integer number (3833151252840).

Almost surely, 2^{67755511666464} is an apocalyptic number.

It is an amenable number.

67755511666464 is an abundant number, since it is smaller than the sum of its proper divisors (116235748469856).

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

67755511666464 is a wasteful number, since it uses less digits than its factorization.

67755511666464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24337468313 (or 24337468305 counting only the distinct ones).

The product of its digits is 762048000, while the sum is 69.

The spelling of 67755511666464 in words is "sixty-seven trillion, seven hundred fifty-five billion, five hundred eleven million, six hundred sixty-six thousand, four hundred sixty-four".