1663964260 has 24 divisors (see below), whose sum is σ = 3993514560. Its totient is φ = 570501984.

The previous prime is 1663964251. The next prime is 1663964293. The reversal of 1663964260 is 624693661.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5942590 + ... + 5942869.

It is an arithmetic number, because the mean of its divisors is an integer number (166396440).

Almost surely, 2^1663964260 is an apocalyptic number.

1663964260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1663964260 is an abundant number, since it is smaller than the sum of its proper divisors (2329550300).

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

1663964260 is a wasteful number, since it uses less digits than its factorization.

1663964260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11885475 (or 11885473 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 43.

The square root of 1663964260 is about 40791.7180319731. The cubic root of 1663964260 is about 1184.9899433591.

The spelling of 1663964260 in words is "one billion, six hundred sixty-three million, nine hundred sixty-four thousand, two hundred sixty".