663226542 has 80 divisors (see below), whose sum is σ = 1716664752. Its totient is φ = 189146880.

The previous prime is 663226519. The next prime is 663226573. The reversal of 663226542 is 245622366.

663226542 is a `hidden beast` number, since 66 + 32 + 26 + 542 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 663226497 and 663226506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 19348 + ... + 41240.

Almost surely, 2^663226542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 663226542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (858332376).

663226542 is an abundant number, since it is smaller than the sum of its proper divisors (1053438210).

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

663226542 is a wasteful number, since it uses less digits than its factorization.

663226542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21935 (or 21926 counting only the distinct ones).

The product of its digits is 103680, while the sum is 36.

The square root of 663226542 is about 25753.1850845677. The cubic root of 663226542 is about 872.0752598610.

The spelling of 663226542 in words is "six hundred sixty-three million, two hundred twenty-six thousand, five hundred forty-two".