1663244416 has 16 divisors (see below), whose sum is σ = 3313494990. Its totient is φ = 831622144.

The previous prime is 1663244399. The next prime is 1663244431. The reversal of 1663244416 is 6144423661.

It can be written as a sum of positive squares in only one way, i.e., 907214400 + 756030016 = 30120^2 + 27496^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6496921 + ... + 6497176.

Almost surely, 2^1663244416 is an apocalyptic number.

1663244416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1663244416 is a deficient number, since it is larger than the sum of its proper divisors (1650250574).

1663244416 is an equidigital number, since it uses as much as digits as its factorization.

1663244416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12994111 (or 12994099 counting only the distinct ones).

The product of its digits is 82944, while the sum is 37.

The square root of 1663244416 is about 40782.8936687921. The cubic root of 1663244416 is about 1184.8190400617.

The spelling of 1663244416 in words is "one billion, six hundred sixty-three million, two hundred forty-four thousand, four hundred sixteen".