666111316 has 24 divisors (see below), whose sum is σ = 1256790024. Its totient is φ = 307086720.

The previous prime is 666111311. The next prime is 666111337. The reversal of 666111316 is 613111666.

It can be written as a sum of positive squares in 4 ways, for example, as 10956100 + 655155216 = 3310^2 + 25596^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666111311) 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, 42126 + ... + 55738.

It is an arithmetic number, because the mean of its divisors is an integer number (52366251).

Almost surely, 2^666111316 is an apocalyptic number.

It is an amenable number.

666111316 is a deficient number, since it is larger than the sum of its proper divisors (590678708).

666111316 is a wasteful number, since it uses less digits than its factorization.

666111316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14571 (or 14569 counting only the distinct ones).

The product of its digits is 3888, while the sum is 31.

The square root of 666111316 is about 25809.1324147093. The cubic root of 666111316 is about 873.3378256022.

The spelling of 666111316 in words is "six hundred sixty-six million, one hundred eleven thousand, three hundred sixteen".