663961692 has 48 divisors (see below), whose sum is σ = 1599131520. Its totient is φ = 214306752.

The previous prime is 663961691. The next prime is 663961729. The reversal of 663961692 is 296169366.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663961691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40438 + ... + 54434.

It is an arithmetic number, because the mean of its divisors is an integer number (33315240).

Almost surely, 2^663961692 is an apocalyptic number.

It is an amenable number.

663961692 is an abundant number, since it is smaller than the sum of its proper divisors (935169828).

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

663961692 is a wasteful number, since it uses less digits than its factorization.

663961692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14130 (or 14128 counting only the distinct ones).

The product of its digits is 629856, while the sum is 48.

The square root of 663961692 is about 25767.4541233704. The cubic root of 663961692 is about 872.3973566387.

The spelling of 663961692 in words is "six hundred sixty-three million, nine hundred sixty-one thousand, six hundred ninety-two".