667730757616343 has 32 divisors (see below), whose sum is σ = 709221356553024. Its totient is φ = 627900024960000.

The previous prime is 667730757616339. The next prime is 667730757616357. The reversal of 667730757616343 is 343616757037766.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 667730757616343 - 2² = 667730757616339 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667730757616303) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 104394773 + ... + 110606193.

It is an arithmetic number, because the mean of its divisors is an integer number (22163167392282).

Almost surely, 2^{667730757616343} is an apocalyptic number.

667730757616343 is a deficient number, since it is larger than the sum of its proper divisors (41490598936681).

667730757616343 is a wasteful number, since it uses less digits than its factorization.

667730757616343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6212387.

The product of its (nonzero) digits is 1680315840, while the sum is 71.

The spelling of 667730757616343 in words is "six hundred sixty-seven trillion, seven hundred thirty billion, seven hundred fifty-seven million, six hundred sixteen thousand, three hundred forty-three".