66286849 has 4 divisors (see below), whose sum is σ = 66419136. Its totient is φ = 66154564.

The previous prime is 66286823. The next prime is 66286861. The reversal of 66286849 is 94868266.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66286849 - 2¹³ = 66278657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66286879) 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, 65389 + ... + 66394.

It is an arithmetic number, because the mean of its divisors is an integer number (16604784).

Almost surely, 2^66286849 is an apocalyptic number.

It is an amenable number.

66286849 is a deficient number, since it is larger than the sum of its proper divisors (132287).

66286849 is a wasteful number, since it uses less digits than its factorization.

66286849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132286.

The product of its digits is 995328, while the sum is 49.

The square root of 66286849 is about 8141.6735994512. The cubic root of 66286849 is about 404.7086234230.

The spelling of 66286849 in words is "sixty-six million, two hundred eighty-six thousand, eight hundred forty-nine".