667140543 has 40 divisors (see below), whose sum is σ = 1017910080. Its totient is φ = 435352320.

The previous prime is 667140541. The next prime is 667140557. The reversal of 667140543 is 345041766.

It is a happy number.

667140543 is a `hidden beast` number, since 6 + 6 + 71 + 40 + 543 = 666.

It is not a de Polignac number, because 667140543 - 2¹ = 667140541 is a prime.

It is a super-2 number, since 2×667140543² = 890153008228669698, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 667140498 and 667140507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667140541) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 876283 + ... + 877043.

It is an arithmetic number, because the mean of its divisors is an integer number (25447752).

Almost surely, 2^667140543 is an apocalyptic number.

667140543 is a deficient number, since it is larger than the sum of its proper divisors (350769537).

667140543 is a wasteful number, since it uses less digits than its factorization.

667140543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 989 (or 980 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 667140543 is about 25829.0639203205. The cubic root of 667140543 is about 873.7874002669.

The spelling of 667140543 in words is "six hundred sixty-seven million, one hundred forty thousand, five hundred forty-three".