668833653 has 8 divisors (see below), whose sum is σ = 912517408. Its totient is φ = 435519504.

The previous prime is 668833651. The next prime is 668833657. The reversal of 668833653 is 356338866.

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

It is not a de Polignac number, because 668833653 - 2¹ = 668833651 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668833651) 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, 2592250 + ... + 2592507.

It is an arithmetic number, because the mean of its divisors is an integer number (114064676).

Almost surely, 2^668833653 is an apocalyptic number.

It is an amenable number.

668833653 is a deficient number, since it is larger than the sum of its proper divisors (243683755).

668833653 is a wasteful number, since it uses less digits than its factorization.

668833653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5184803.

The product of its digits is 1866240, while the sum is 48.

The square root of 668833653 is about 25861.8184395452. The cubic root of 668833653 is about 874.5259595020.

The spelling of 668833653 in words is "six hundred sixty-eight million, eight hundred thirty-three thousand, six hundred fifty-three".