66541143 has 8 divisors (see below), whose sum is σ = 90609408. Its totient is φ = 43416824.

The previous prime is 66541141. The next prime is 66541177. The reversal of 66541143 is 34114566.

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

It is a cyclic number.

It is not a de Polignac number, because 66541143 - 2¹ = 66541141 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66541143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66541141) 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, 235821 + ... + 236102.

It is an arithmetic number, because the mean of its divisors is an integer number (11326176).

Almost surely, 2^66541143 is an apocalyptic number.

66541143 is a deficient number, since it is larger than the sum of its proper divisors (24068265).

66541143 is a wasteful number, since it uses less digits than its factorization.

66541143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471973.

The product of its digits is 8640, while the sum is 30.

The square root of 66541143 is about 8157.2754642711. The cubic root of 66541143 is about 405.2254863851.

The spelling of 66541143 in words is "sixty-six million, five hundred forty-one thousand, one hundred forty-three".