663917922 has 24 divisors (see below), whose sum is σ = 1440347376. Its totient is φ = 221020056.

The previous prime is 663917897. The next prime is 663917927. The reversal of 663917922 is 229719366.

It is a happy number.

663917922 is a `hidden beast` number, since 6 + 639 + 1 + 7 + 9 + 2 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (663917927) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9268 + ... + 37599.

It is an arithmetic number, because the mean of its divisors is an integer number (60014474).

Almost surely, 2^663917922 is an apocalyptic number.

663917922 is an abundant number, since it is smaller than the sum of its proper divisors (776429454).

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

663917922 is a wasteful number, since it uses less digits than its factorization.

663917922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47662 (or 47659 counting only the distinct ones).

The product of its digits is 244944, while the sum is 45.

The square root of 663917922 is about 25766.6047821594. The cubic root of 663917922 is about 872.3781860189.

The spelling of 663917922 in words is "six hundred sixty-three million, nine hundred seventeen thousand, nine hundred twenty-two".