666096493 has 4 divisors (see below), whose sum is σ = 672207580. Its totient is φ = 659985408.

The previous prime is 666096481. The next prime is 666096503. The reversal of 666096493 is 394690666.

It is a happy number.

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 195944004 + 470152489 = 13998^2 + 21683^2 .

It is not a de Polignac number, because 666096493 - 2²⁵ = 632542061 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 (666096463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3055380 + ... + 3055597.

It is an arithmetic number, because the mean of its divisors is an integer number (168051895).

Almost surely, 2^666096493 is an apocalyptic number.

It is an amenable number.

666096493 is a deficient number, since it is larger than the sum of its proper divisors (6111087).

666096493 is a wasteful number, since it uses less digits than its factorization.

666096493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6111086.

The product of its (nonzero) digits is 1259712, while the sum is 49.

The square root of 666096493 is about 25808.8452473178. The cubic root of 666096493 is about 873.3313474144.

The spelling of 666096493 in words is "six hundred sixty-six million, ninety-six thousand, four hundred ninety-three".