663005426 has 4 divisors (see below), whose sum is σ = 994508142. Its totient is φ = 331502712.

The previous prime is 663005419. The next prime is 663005459. The reversal of 663005426 is 624500366.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 496621225 + 166384201 = 22285^2 + 12899^2 .

It is a junction number, because it is equal to n+sod(n) for n = 663005392 and 663005401.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165751355 + ... + 165751358.

Almost surely, 2^663005426 is an apocalyptic number.

663005426 is a deficient number, since it is larger than the sum of its proper divisors (331502716).

663005426 is a wasteful number, since it uses less digits than its factorization.

663005426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331502715.

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 663005426 is about 25748.8917431411. The cubic root of 663005426 is about 871.9783340926.

The spelling of 663005426 in words is "six hundred sixty-three million, five thousand, four hundred twenty-six".