1663026426 has 24 divisors (see below), whose sum is σ = 3609905364. Its totient is φ = 553314240.

The previous prime is 1663026413. The next prime is 1663026467. The reversal of 1663026426 is 6246203661.

1663026426 is a `hidden beast` number, since 1 + 6 + 6 + 3 + 0 + 2 + 642 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1564123401 + 98903025 = 39549^2 + 9945^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 75651 + ... + 95126.

Almost surely, 2^1663026426 is an apocalyptic number.

1663026426 is an abundant number, since it is smaller than the sum of its proper divisors (1946878938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1663026426 is a wasteful number, since it uses less digits than its factorization.

1663026426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171326 (or 171323 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The square root of 1663026426 is about 40780.2210146046. The cubic root of 1663026426 is about 1184.7672757741.

The spelling of 1663026426 in words is "one billion, six hundred sixty-three million, twenty-six thousand, four hundred twenty-six".