1663651448 has 8 divisors (see below), whose sum is σ = 3119346480. Its totient is φ = 831825720.

The previous prime is 1663651421. The next prime is 1663651453. The reversal of 1663651448 is 8441563661.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×1663651448² = 5535472280864993408, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1663651399 and 1663651408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103978208 + ... + 103978223.

It is an arithmetic number, because the mean of its divisors is an integer number (389918310).

Almost surely, 2^1663651448 is an apocalyptic number.

It is an amenable number.

1663651448 is a deficient number, since it is larger than the sum of its proper divisors (1455695032).

1663651448 is a wasteful number, since it uses less digits than its factorization.

1663651448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207956437 (or 207956433 counting only the distinct ones).

The product of its digits is 414720, while the sum is 44.

The square root of 1663651448 is about 40787.8835930476. The cubic root of 1663651448 is about 1184.9156824883.

The spelling of 1663651448 in words is "one billion, six hundred sixty-three million, six hundred fifty-one thousand, four hundred forty-eight".