67545543 has 8 divisors (see below), whose sum is σ = 96988528. Its totient is φ = 41566464.

The previous prime is 67545529. The next prime is 67545557. The reversal of 67545543 is 34554576.

It is an interprime number because it is at equal distance from previous prime (67545529) and next prime (67545557).

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

It is not a de Polignac number, because 67545543 - 2⁸ = 67545287 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 1731937 = 67545543 / (6 + 7 + 5 + 4 + 5 + 5 + 4 + 3).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67545563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 865930 + ... + 866007.

It is an arithmetic number, because the mean of its divisors is an integer number (12123566).

Almost surely, 2^67545543 is an apocalyptic number.

67545543 is a deficient number, since it is larger than the sum of its proper divisors (29442985).

67545543 is a wasteful number, since it uses less digits than its factorization.

67545543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1731953.

The product of its digits is 252000, while the sum is 39.

The square root of 67545543 is about 8218.6095539331. The cubic root of 67545543 is about 407.2541942883.

The spelling of 67545543 in words is "sixty-seven million, five hundred forty-five thousand, five hundred forty-three".