231466666 has 4 divisors (see below), whose sum is σ = 347200002. Its totient is φ = 115733332.

The previous prime is 231466643. The next prime is 231466667. The reversal of 231466666 is 666664132.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 146918641 + 84548025 = 12121^2 + 9195^2 .

231466666 is a modest number, since divided by 66666 gives 2314 as remainder.

It is not an unprimeable number, because it can be changed into a prime (231466667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57866665 + ... + 57866668.

Almost surely, 2^231466666 is an apocalyptic number.

231466666 is a deficient number, since it is larger than the sum of its proper divisors (115733336).

231466666 is a wasteful number, since it uses less digits than its factorization.

231466666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115733335.

The product of its digits is 186624, while the sum is 40.

The square root of 231466666 is about 15214.0285920594. The cubic root of 231466666 is about 613.9921501258.

The spelling of 231466666 in words is "two hundred thirty-one million, four hundred sixty-six thousand, six hundred sixty-six".