631666733622 has 32 divisors (see below), whose sum is σ = 1280554047360. Its totient is φ = 207703144320.

The previous prime is 631666733609. The next prime is 631666733623. The reversal of 631666733622 is 226337666136.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631666733623) 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 in 15 ways as a sum of consecutive naturals, for example, 2064672 + ... + 2350787.

It is an arithmetic number, because the mean of its divisors is an integer number (40017313980).

Almost surely, 2^631666733622 is an apocalyptic number.

631666733622 is an abundant number, since it is smaller than the sum of its proper divisors (648887313738).

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

631666733622 is a wasteful number, since it uses less digits than its factorization.

631666733622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4415788.

The product of its digits is 5878656, while the sum is 51.

The spelling of 631666733622 in words is "six hundred thirty-one billion, six hundred sixty-six million, seven hundred thirty-three thousand, six hundred twenty-two".