668250773 has 4 divisors (see below), whose sum is σ = 707559660. Its totient is φ = 628941888.

The previous prime is 668250743. The next prime is 668250797. The reversal of 668250773 is 377052866.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 574896529 + 93354244 = 23977^2 + 9662^2 .

It is a cyclic number.

It is not a de Polignac number, because 668250773 - 2¹⁰ = 668249749 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 (668250743) 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, 19654418 + ... + 19654451.

It is an arithmetic number, because the mean of its divisors is an integer number (176889915).

Almost surely, 2^668250773 is an apocalyptic number.

It is an amenable number.

668250773 is a deficient number, since it is larger than the sum of its proper divisors (39308887).

668250773 is a wasteful number, since it uses less digits than its factorization.

668250773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39308886.

The product of its (nonzero) digits is 423360, while the sum is 44.

The square root of 668250773 is about 25850.5468607533. The cubic root of 668250773 is about 874.2718395929.

The spelling of 668250773 in words is "six hundred sixty-eight million, two hundred fifty thousand, seven hundred seventy-three".