1663773696 has 220 divisors, whose sum is σ = 5354002192. Its totient is φ = 511598592.

The previous prime is 1663773691. The next prime is 1663773757. The reversal of 1663773696 is 6963773661.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (1663773691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1077501 + ... + 1079043.

Almost surely, 2^1663773696 is an apocalyptic number.

1663773696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1663773696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2677001096).

1663773696 is an abundant number, since it is smaller than the sum of its proper divisors (3690228496).

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

1663773696 is a wasteful number, since it uses less digits than its factorization.

1663773696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1588 (or 1561 counting only the distinct ones).

The product of its digits is 5143824, while the sum is 54.

The square root of 1663773696 is about 40789.3821478090. The cubic root of 1663773696 is about 1184.9447049988.

The spelling of 1663773696 in words is "one billion, six hundred sixty-three million, seven hundred seventy-three thousand, six hundred ninety-six".