666115233 has 48 divisors (see below), whose sum is σ = 1104964224. Its totient is φ = 349378560.

The previous prime is 666115217. The next prime is 666115253. The reversal of 666115233 is 332511666.

It is not a de Polignac number, because 666115233 - 2⁴ = 666115217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 666115194 and 666115203.

It is not an unprimeable number, because it can be changed into a prime (666115253) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 247491 + ... + 250167.

It is an arithmetic number, because the mean of its divisors is an integer number (23020088).

Almost surely, 2^666115233 is an apocalyptic number.

It is an amenable number.

666115233 is a deficient number, since it is larger than the sum of its proper divisors (438848991).

666115233 is a wasteful number, since it uses less digits than its factorization.

666115233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2762 (or 2745 counting only the distinct ones).

The product of its digits is 19440, while the sum is 33.

The square root of 666115233 is about 25809.2082985899. The cubic root of 666115233 is about 873.3395374570.

Adding to 666115233 its reverse (332511666), we get a palindrome (998626899).

The spelling of 666115233 in words is "six hundred sixty-six million, one hundred fifteen thousand, two hundred thirty-three".