667543383345766 has 8 divisors (see below), whose sum is σ = 1011229085662704. Its totient is φ = 330467021458200.

The previous prime is 667543383345737. The next prime is 667543383345791.

667543383345766 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×667543383345766² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 667543383345692 and 667543383345701.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1652335107090 + ... + 1652335107493.

It is an arithmetic number, because the mean of its divisors is an integer number (126403635707838).

Almost surely, 2^{667543383345766} is an apocalyptic number.

667543383345766 is a deficient number, since it is larger than the sum of its proper divisors (343685702316938).

667543383345766 is a wasteful number, since it uses less digits than its factorization.

667543383345766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3304670214686.

The product of its digits is 16460236800, while the sum is 76.

The spelling of 667543383345766 in words is "six hundred sixty-seven trillion, five hundred forty-three billion, three hundred eighty-three million, three hundred forty-five thousand, seven hundred sixty-six".