1663757201 has 2 divisors, whose sum is σ = 1663757202. Its totient is φ = 1663757200.

The previous prime is 1663757191. The next prime is 1663757203. The reversal of 1663757201 is 1027573661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1658444176 + 5313025 = 40724^2 + 2305^2 .

It is an emirp because it is prime and its reverse (1027573661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1663757201 - 2¹⁰ = 1663756177 is a prime.

Together with 1663757203, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1663757203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 831878600 + 831878601.

It is an arithmetic number, because the mean of its divisors is an integer number (831878601).

Almost surely, 2^1663757201 is an apocalyptic number.

It is an amenable number.

1663757201 is a deficient number, since it is larger than the sum of its proper divisors (1).

1663757201 is an equidigital number, since it uses as much as digits as its factorization.

1663757201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52920, while the sum is 38.

The square root of 1663757201 is about 40789.1799500799. The cubic root of 1663757201 is about 1184.9407890560.

The spelling of 1663757201 in words is "one billion, six hundred sixty-three million, seven hundred fifty-seven thousand, two hundred one".