663122955840 has 112 divisors (see below), whose sum is σ = 2115995971200. Its totient is φ = 175944130560.

The previous prime is 663122955829. The next prime is 663122955841. The reversal of 663122955840 is 48559221366.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (663122955841) 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, 1544521 + ... + 1926600.

Almost surely, 2^663122955840 is an apocalyptic number.

663122955840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

663122955840 is an abundant number, since it is smaller than the sum of its proper divisors (1452873015360).

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

663122955840 is a wasteful number, since it uses less digits than its factorization.

663122955840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3471340 (or 3471330 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 51.

The spelling of 663122955840 in words is "six hundred sixty-three billion, one hundred twenty-two million, nine hundred fifty-five thousand, eight hundred forty".