667608543 has 12 divisors (see below), whose sum is σ = 1102084048. Its totient is φ = 381490560.

The previous prime is 667608523. The next prime is 667608559. The reversal of 667608543 is 345806766.

It is not a de Polignac number, because 667608543 - 2⁹ = 667608031 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 (667608523) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5298418 + ... + 5298543.

Almost surely, 2^667608543 is an apocalyptic number.

667608543 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

667608543 is a deficient number, since it is larger than the sum of its proper divisors (434475505).

667608543 is a wasteful number, since it uses less digits than its factorization.

667608543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10596974 (or 10596971 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The square root of 667608543 is about 25838.1218938219. The cubic root of 667608543 is about 873.9916735256.

The spelling of 667608543 in words is "six hundred sixty-seven million, six hundred eight thousand, five hundred forty-three".