667108265645 has 16 divisors (see below), whose sum is σ = 848270568960. Its totient is φ = 501907709184.

The previous prime is 667108265627. The next prime is 667108265687. The reversal of 667108265645 is 546562801766.

It is a cyclic number.

It is not a de Polignac number, because 667108265645 - 2³⁶ = 598388788909 is a prime.

It is a super-3 number, since 3×667108265645³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2900885 + ... + 3122394.

It is an arithmetic number, because the mean of its divisors is an integer number (53016910560).

Almost surely, 2^667108265645 is an apocalyptic number.

It is an amenable number.

667108265645 is a deficient number, since it is larger than the sum of its proper divisors (181162303315).

667108265645 is a wasteful number, since it uses less digits than its factorization.

667108265645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6024604.

The product of its (nonzero) digits is 14515200, while the sum is 56.

The spelling of 667108265645 in words is "six hundred sixty-seven billion, one hundred eight million, two hundred sixty-five thousand, six hundred forty-five".