666376236 has 18 divisors (see below), whose sum is σ = 1684451132. Its totient is φ = 222125400.

The previous prime is 666376231. The next prime is 666376237. The reversal of 666376236 is 632673666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 666376191 and 666376200.

It is not an unprimeable number, because it can be changed into a prime (666376231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9255190 + ... + 9255261.

Almost surely, 2^666376236 is an apocalyptic number.

It is an amenable number.

666376236 is an abundant number, since it is smaller than the sum of its proper divisors (1018074896).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

666376236 is a wasteful number, since it uses less digits than its factorization.

666376236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18510461 (or 18510456 counting only the distinct ones).

The product of its digits is 979776, while the sum is 45.

The square root of 666376236 is about 25814.2641963702. The cubic root of 666376236 is about 873.4535890318.

The spelling of 666376236 in words is "six hundred sixty-six million, three hundred seventy-six thousand, two hundred thirty-six".