1663016387 has 2 divisors, whose sum is σ = 1663016388. Its totient is φ = 1663016386.

The previous prime is 1663016323. The next prime is 1663016419. The reversal of 1663016387 is 7836103661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1663016387 - 2⁶ = 1663016323 is a prime.

It is not a weakly prime, because it can be changed into another prime (1663016317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 831508193 + 831508194.

It is an arithmetic number, because the mean of its divisors is an integer number (831508194).

Almost surely, 2^1663016387 is an apocalyptic number.

1663016387 is a deficient number, since it is larger than the sum of its proper divisors (1).

1663016387 is an equidigital number, since it uses as much as digits as its factorization.

1663016387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 1663016387 is about 40780.0979277883. The cubic root of 1663016387 is about 1184.7648917866.

The spelling of 1663016387 in words is "one billion, six hundred sixty-three million, sixteen thousand, three hundred eighty-seven".