1663785948 has 24 divisors (see below), whose sum is σ = 4235091840. Its totient is φ = 504177520.

The previous prime is 1663785931. The next prime is 1663785961. The reversal of 1663785948 is 8495873661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6302088 + ... + 6302351.

It is an arithmetic number, because the mean of its divisors is an integer number (176462160).

Almost surely, 2^1663785948 is an apocalyptic number.

It is an amenable number.

1663785948 is an abundant number, since it is smaller than the sum of its proper divisors (2571305892).

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

1663785948 is a wasteful number, since it uses less digits than its factorization.

1663785948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12604457 (or 12604455 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 57.

The square root of 1663785948 is about 40789.5323336760. The cubic root of 1663785948 is about 1184.9476136289.

The spelling of 1663785948 in words is "one billion, six hundred sixty-three million, seven hundred eighty-five thousand, nine hundred forty-eight".