1663016399 has 8 divisors (see below), whose sum is σ = 1815012480. Its totient is φ = 1511155800.

The previous prime is 1663016387. The next prime is 1663016419. The reversal of 1663016399 is 9936103661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1663016399 - 2¹² = 1663012303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1663016309) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7289 + ... + 58130.

It is an arithmetic number, because the mean of its divisors is an integer number (226876560).

Almost surely, 2^1663016399 is an apocalyptic number.

1663016399 is a deficient number, since it is larger than the sum of its proper divisors (151996081).

1663016399 is a wasteful number, since it uses less digits than its factorization.

1663016399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67741.

The product of its (nonzero) digits is 157464, while the sum is 44.

The square root of 1663016399 is about 40780.0980749188. The cubic root of 1663016399 is about 1184.7648946363.

The spelling of 1663016399 in words is "one billion, six hundred sixty-three million, sixteen thousand, three hundred ninety-nine".