67664655646677 has 48 divisors (see below), whose sum is σ = 100498938898176. Its totient is φ = 43843731840000.

The previous prime is 67664655646583. The next prime is 67664655646699. The reversal of 67664655646677 is 77664655646676.

67664655646677 is a `hidden beast` number, since 6 + 7 + 6 + 6 + 46 + 5 + 564 + 6 + 6 + 7 + 7 = 666.

It is not a de Polignac number, because 67664655646677 - 2²³ = 67664647258069 is a prime.

It is a super-2 number, since 2×67664655646677² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 67664655646596 and 67664655646605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67664655656677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2265062413 + ... + 2265092285.

It is an arithmetic number, because the mean of its divisors is an integer number (2093727893712).

Almost surely, 2^{67664655646677} is an apocalyptic number.

It is an amenable number.

67664655646677 is a deficient number, since it is larger than the sum of its proper divisors (32834283251499).

67664655646677 is a wasteful number, since it uses less digits than its factorization.

67664655646677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52842 (or 52839 counting only the distinct ones).

The product of its digits is 38407219200, while the sum is 81.

Subtracting 67664655646677 from its reverse (77664655646676), we obtain a palindrome (9999999999999).

The spelling of 67664655646677 in words is "sixty-seven trillion, six hundred sixty-four billion, six hundred fifty-five million, six hundred forty-six thousand, six hundred seventy-seven".