667663366766 has 16 divisors (see below), whose sum is σ = 1092673732608. Its totient is φ = 303446215800.

The previous prime is 667663366723. The next prime is 667663366771.

It is a happy number.

667663366766 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 667663366696 and 667663366705.

It is a congruent number.

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, 1672340 + ... + 2032743.

It is an arithmetic number, because the mean of its divisors is an integer number (68292108288).

Almost surely, 2^667663366766 is an apocalyptic number.

667663366766 is a deficient number, since it is larger than the sum of its proper divisors (425010365842).

667663366766 is a wasteful number, since it uses less digits than its factorization.

667663366766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3713287.

The product of its digits is 740710656, while the sum is 68.

The spelling of 667663366766 in words is "six hundred sixty-seven billion, six hundred sixty-three million, three hundred sixty-six thousand, seven hundred sixty-six".