667803180565 has 8 divisors (see below), whose sum is σ = 803547371520. Its totient is φ = 532786841232.

The previous prime is 667803180559. The next prime is 667803180619. The reversal of 667803180565 is 565081308766.

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

It is a cyclic number.

It is not a de Polignac number, because 667803180565 - 2¹⁵ = 667803147797 is a prime.

It is a super-2 number, since 2×667803180565² (a number of 24 digits) contains 22 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 (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181960885 + ... + 181964554.

It is an arithmetic number, because the mean of its divisors is an integer number (100443421440).

Almost surely, 2^667803180565 is an apocalyptic number.

It is an amenable number.

667803180565 is a deficient number, since it is larger than the sum of its proper divisors (135744190955).

667803180565 is a wasteful number, since it uses less digits than its factorization.

667803180565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363925811.

The product of its (nonzero) digits is 7257600, while the sum is 55.

The spelling of 667803180565 in words is "six hundred sixty-seven billion, eight hundred three million, one hundred eighty thousand, five hundred sixty-five".