668683296 has 48 divisors (see below), whose sum is σ = 1950328800. Its totient is φ = 222894144.

The previous prime is 668683291. The next prime is 668683297. The reversal of 668683296 is 692386866.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (668683291) 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, 386106 + ... + 387833.

It is an arithmetic number, because the mean of its divisors is an integer number (40631850).

Almost surely, 2^668683296 is an apocalyptic number.

It is an amenable number.

668683296 is an abundant number, since it is smaller than the sum of its proper divisors (1281645504).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

668683296 is a wasteful number, since it uses less digits than its factorization.

668683296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 773958 (or 773944 counting only the distinct ones).

The product of its digits is 4478976, while the sum is 54.

The square root of 668683296 is about 25858.9113459944. The cubic root of 668683296 is about 874.4604220531.

The spelling of 668683296 in words is "six hundred sixty-eight million, six hundred eighty-three thousand, two hundred ninety-six".