231636066 has 16 divisors (see below), whose sum is σ = 464912544. Its totient is φ = 76938624.

The previous prime is 231636047. The next prime is 231636071. The reversal of 231636066 is 660636132.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66511 + ... + 69906.

It is an arithmetic number, because the mean of its divisors is an integer number (29057034).

Almost surely, 2^231636066 is an apocalyptic number.

231636066 is an abundant number, since it is smaller than the sum of its proper divisors (233276478).

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

231636066 is a wasteful number, since it uses less digits than its factorization.

231636066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136705.

The product of its (nonzero) digits is 23328, while the sum is 33.

The square root of 231636066 is about 15219.5948040676. The cubic root of 231636066 is about 614.1418979763.

The spelling of 231636066 in words is "two hundred thirty-one million, six hundred thirty-six thousand, sixty-six".