668874773 has 4 divisors (see below), whose sum is σ = 764428320. Its totient is φ = 573321228.

The previous prime is 668874743. The next prime is 668874781. The reversal of 668874773 is 377478866.

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 668874773 - 2¹⁰ = 668873749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668874733) 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, 47776763 + ... + 47776776.

It is an arithmetic number, because the mean of its divisors is an integer number (191107080).

Almost surely, 2^668874773 is an apocalyptic number.

It is an amenable number.

668874773 is a deficient number, since it is larger than the sum of its proper divisors (95553547).

668874773 is an equidigital number, since it uses as much as digits as its factorization.

668874773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95553546.

The product of its digits is 9483264, while the sum is 56.

The square root of 668874773 is about 25862.6134216943. The cubic root of 668874773 is about 874.5438811334.

The spelling of 668874773 in words is "six hundred sixty-eight million, eight hundred seventy-four thousand, seven hundred seventy-three".