631431150066 has 12 divisors (see below), whose sum is σ = 1368100825182. Its totient is φ = 210477050016.

The previous prime is 631431150061. The next prime is 631431150107. The reversal of 631431150066 is 660051134136.

631431150066 is a `hidden beast` number, since 6 + 3 + 143 + 1 + 1 + 500 + 6 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 541173566025 + 90257584041 = 735645^2 + 300429^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 631431150066.

It is not an unprimeable number, because it can be changed into a prime (631431150061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17539754151 + ... + 17539754186.

Almost surely, 2^631431150066 is an apocalyptic number.

631431150066 is an abundant number, since it is smaller than the sum of its proper divisors (736669675116).

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

631431150066 is a wasteful number, since it uses less digits than its factorization.

631431150066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35079508345 (or 35079508342 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The spelling of 631431150066 in words is "six hundred thirty-one billion, four hundred thirty-one million, one hundred fifty thousand, sixty-six".