66098543 has 4 divisors (see below), whose sum is σ = 75541200. Its totient is φ = 56655888.

The previous prime is 66098537. The next prime is 66098597. The reversal of 66098543 is 34589066.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66098543 - 2¹² = 66094447 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66098543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66098503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4721318 + ... + 4721331.

It is an arithmetic number, because the mean of its divisors is an integer number (18885300).

Almost surely, 2^66098543 is an apocalyptic number.

66098543 is a deficient number, since it is larger than the sum of its proper divisors (9442657).

66098543 is an equidigital number, since it uses as much as digits as its factorization.

66098543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9442656.

The product of its (nonzero) digits is 155520, while the sum is 41.

The square root of 66098543 is about 8130.1010448825. The cubic root of 66098543 is about 404.3250312949.

The spelling of 66098543 in words is "sixty-six million, ninety-eight thousand, five hundred forty-three".