663279242 has 32 divisors (see below), whose sum is σ = 1119283920. Its totient is φ = 293207040.

The previous prime is 663279233. The next prime is 663279251. The reversal of 663279242 is 242972366.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (663279233) and next prime (663279251).

It can be written as a sum of positive squares in 8 ways, for example, as 654285241 + 8994001 = 25579^2 + 2999^2 .

It is a nialpdrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 663279242.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27392 + ... + 45572.

Almost surely, 2^663279242 is an apocalyptic number.

663279242 is a deficient number, since it is larger than the sum of its proper divisors (456004678).

663279242 is a wasteful number, since it uses less digits than its factorization.

663279242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18266.

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

The square root of 663279242 is about 25754.2082386549. The cubic root of 663279242 is about 872.0983576243.

The spelling of 663279242 in words is "six hundred sixty-three million, two hundred seventy-nine thousand, two hundred forty-two".