663247490 has 8 divisors (see below), whose sum is σ = 1193845500. Its totient is φ = 265298992.

The previous prime is 663247477. The next prime is 663247513. The reversal of 663247490 is 94742366.

It can be written as a sum of positive squares in 2 ways, for example, as 634485721 + 28761769 = 25189^2 + 5363^2 .

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

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, 33162365 + ... + 33162384.

Almost surely, 2^663247490 is an apocalyptic number.

663247490 is a deficient number, since it is larger than the sum of its proper divisors (530598010).

663247490 is a wasteful number, since it uses less digits than its factorization.

663247490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66324756.

The product of its (nonzero) digits is 217728, while the sum is 41.

The square root of 663247490 is about 25753.5917883312. The cubic root of 663247490 is about 872.0844412588.

The spelling of 663247490 in words is "six hundred sixty-three million, two hundred forty-seven thousand, four hundred ninety".