663696126 has 16 divisors (see below), whose sum is σ = 1474880400. Its totient is φ = 221232024.

The previous prime is 663696113. The next prime is 663696179. The reversal of 663696126 is 621696366.

663696126 is a `hidden beast` number, since 6 + 636 + 9 + 6 + 1 + 2 + 6 = 666.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6145281 + ... + 6145388.

It is an arithmetic number, because the mean of its divisors is an integer number (92180025).

Almost surely, 2^663696126 is an apocalyptic number.

663696126 is an abundant number, since it is smaller than the sum of its proper divisors (811184274).

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

663696126 is a wasteful number, since it uses less digits than its factorization.

663696126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12290680 (or 12290674 counting only the distinct ones).

The product of its digits is 419904, while the sum is 45.

The square root of 663696126 is about 25762.3004795767. The cubic root of 663696126 is about 872.2810296605.

The spelling of 663696126 in words is "six hundred sixty-three million, six hundred ninety-six thousand, one hundred twenty-six".