667216056365 has 16 divisors (see below), whose sum is σ = 844083652608. Its totient is φ = 505301761536.

The previous prime is 667216056343. The next prime is 667216056379. The reversal of 667216056365 is 563650612766.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 667216056365 - 2³² = 662921089069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29895437 + ... + 29917746.

It is an arithmetic number, because the mean of its divisors is an integer number (52755228288).

Almost surely, 2^667216056365 is an apocalyptic number.

It is an amenable number.

667216056365 is a deficient number, since it is larger than the sum of its proper divisors (176867596243).

667216056365 is a wasteful number, since it uses less digits than its factorization.

667216056365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59813308.

The product of its (nonzero) digits is 8164800, while the sum is 53.

The spelling of 667216056365 in words is "six hundred sixty-seven billion, two hundred sixteen million, fifty-six thousand, three hundred sixty-five".