663620042 has 8 divisors (see below), whose sum is σ = 1001184516. Its totient is φ = 329891872.

The previous prime is 663620033. The next prime is 663620051. The reversal of 663620042 is 240026366.

It is an interprime number because it is at equal distance from previous prime (663620033) and next prime (663620051).

It can be written as a sum of positive squares in 2 ways, for example, as 477815881 + 185804161 = 21859^2 + 13631^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 663619987 and 663620014.

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, 958643 + ... + 959334.

Almost surely, 2^663620042 is an apocalyptic number.

663620042 is a deficient number, since it is larger than the sum of its proper divisors (337564474).

663620042 is a wasteful number, since it uses less digits than its factorization.

663620042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1918152.

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 663620042 is about 25760.8237834119. The cubic root of 663620042 is about 872.2476965515.

The spelling of 663620042 in words is "six hundred sixty-three million, six hundred twenty thousand, forty-two".