666300813 has 4 divisors (see below), whose sum is σ = 888401088. Its totient is φ = 444200540.

The previous prime is 666300793. The next prime is 666300821. The reversal of 666300813 is 318003666.

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 666300813 - 2²⁵ = 632746381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666300883) 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, 111050133 + ... + 111050138.

It is an arithmetic number, because the mean of its divisors is an integer number (222100272).

Almost surely, 2^666300813 is an apocalyptic number.

It is an amenable number.

666300813 is a deficient number, since it is larger than the sum of its proper divisors (222100275).

666300813 is a wasteful number, since it uses less digits than its factorization.

666300813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222100274.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 666300813 is about 25812.8032766687. The cubic root of 666300813 is about 873.4206341874.

The spelling of 666300813 in words is "six hundred sixty-six million, three hundred thousand, eight hundred thirteen".