231326820066 has 64 divisors (see below), whose sum is σ = 495543444480. Its totient is φ = 71856046080.

The previous prime is 231326820061. The next prime is 231326820073. The reversal of 231326820066 is 660028623132.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (231326820061) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 494290 + ... + 840818.

It is an arithmetic number, because the mean of its divisors is an integer number (7742866320).

Almost surely, 2^231326820066 is an apocalyptic number.

231326820066 is an abundant number, since it is smaller than the sum of its proper divisors (264216624414).

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

231326820066 is a wasteful number, since it uses less digits than its factorization.

231326820066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346699.

The product of its (nonzero) digits is 124416, while the sum is 39.

The spelling of 231326820066 in words is "two hundred thirty-one billion, three hundred twenty-six million, eight hundred twenty thousand, sixty-six".