331142666 has 16 divisors (see below), whose sum is σ = 501136200. Its totient is φ = 164102400.

The previous prime is 331142663. The next prime is 331142671. The reversal of 331142666 is 666241133.

It can be written as a sum of positive squares in 4 ways, for example, as 61230625 + 269912041 = 7825^2 + 16429^2 .

It is not an unprimeable number, because it can be changed into a prime (331142663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182966 + ... + 184766.

Almost surely, 2^331142666 is an apocalyptic number.

331142666 is a deficient number, since it is larger than the sum of its proper divisors (169993534).

331142666 is a wasteful number, since it uses less digits than its factorization.

331142666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2569.

The product of its digits is 15552, while the sum is 32.

The square root of 331142666 is about 18197.3257925444. The cubic root of 331142666 is about 691.8390107974.

Adding to 331142666 its reverse (666241133), we get a palindrome (997383799).

The spelling of 331142666 in words is "three hundred thirty-one million, one hundred forty-two thousand, six hundred sixty-six".