31631606066 has 4 divisors (see below), whose sum is σ = 47447409102. Its totient is φ = 15815803032.

The previous prime is 31631606023. The next prime is 31631606077. The reversal of 31631606066 is 66060613613.

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., 31352014225 + 279591841 = 177065^2 + 16721^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7907901515 + ... + 7907901518.

Almost surely, 2^31631606066 is an apocalyptic number.

31631606066 is a deficient number, since it is larger than the sum of its proper divisors (15815803036).

31631606066 is a wasteful number, since it uses less digits than its factorization.

31631606066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15815803035.

The product of its (nonzero) digits is 69984, while the sum is 38.

The spelling of 31631606066 in words is "thirty-one billion, six hundred thirty-one million, six hundred six thousand, sixty-six".