667685508063 has 16 divisors (see below), whose sum is σ = 1017524330496. Its totient is φ = 381497528160.

The previous prime is 667685508059. The next prime is 667685508071. The reversal of 667685508063 is 360805586766.

It is not a de Polignac number, because 667685508063 - 2² = 667685508059 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 667685507988 and 667685508006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667685508163) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1321503 + ... + 1755488.

It is an arithmetic number, because the mean of its divisors is an integer number (63595270656).

Almost surely, 2^667685508063 is an apocalyptic number.

667685508063 is a deficient number, since it is larger than the sum of its proper divisors (349838822433).

667685508063 is a wasteful number, since it uses less digits than its factorization.

667685508063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3087334.

The product of its (nonzero) digits is 43545600, while the sum is 60.

The spelling of 667685508063 in words is "six hundred sixty-seven billion, six hundred eighty-five million, five hundred eight thousand, sixty-three".