663386522 has 8 divisors (see below), whose sum is σ = 998033556. Its totient is φ = 330708672.

The previous prime is 663386491. The next prime is 663386533. The reversal of 663386522 is 225683366.

It can be written as a sum of positive squares in 2 ways, for example, as 649689121 + 13697401 = 25489^2 + 3701^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 663386522.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 491453 + ... + 492800.

Almost surely, 2^663386522 is an apocalyptic number.

663386522 is a deficient number, since it is larger than the sum of its proper divisors (334647034).

663386522 is a wasteful number, since it uses less digits than its factorization.

663386522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 984592.

The product of its digits is 311040, while the sum is 41.

The square root of 663386522 is about 25756.2909208605. The cubic root of 663386522 is about 872.1453733517.

The spelling of 663386522 in words is "six hundred sixty-three million, three hundred eighty-six thousand, five hundred twenty-two".