668536283 has 4 divisors (see below), whose sum is σ = 684842088. Its totient is φ = 652230480.

The previous prime is 668536279. The next prime is 668536303. The reversal of 668536283 is 382635866.

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 668536283 - 2² = 668536279 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (668536243) 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, 8152841 + ... + 8152922.

It is an arithmetic number, because the mean of its divisors is an integer number (171210522).

Almost surely, 2^668536283 is an apocalyptic number.

668536283 is a deficient number, since it is larger than the sum of its proper divisors (16305805).

668536283 is a wasteful number, since it uses less digits than its factorization.

668536283 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16305804.

The product of its digits is 1244160, while the sum is 47.

The square root of 668536283 is about 25856.0685913385. The cubic root of 668536283 is about 874.3963326836.

The spelling of 668536283 in words is "six hundred sixty-eight million, five hundred thirty-six thousand, two hundred eighty-three".