1663614025 has 6 divisors (see below), whose sum is σ = 2062881422. Its totient is φ = 1330891200.

The previous prime is 1663614019. The next prime is 1663614041. The reversal of 1663614025 is 5204163661.

It can be written as a sum of positive squares in 3 ways, for example, as 15578809 + 1648035216 = 3947^2 + 40596^2 .

It is not a de Polignac number, because 1663614025 - 2¹¹ = 1663611977 is a prime.

It is a super-2 number, since 2×1663614025² = 5535223248353401250, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33272256 + ... + 33272305.

Almost surely, 2^1663614025 is an apocalyptic number.

It is an amenable number.

1663614025 is a deficient number, since it is larger than the sum of its proper divisors (399267397).

1663614025 is an equidigital number, since it uses as much as digits as its factorization.

1663614025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66544571 (or 66544566 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 1663614025 is about 40787.4248390359. The cubic root of 1663614025 is about 1184.9067977282.

Adding to 1663614025 its reverse (5204163661), we get a palindrome (6867777686).

The spelling of 1663614025 in words is "one billion, six hundred sixty-three million, six hundred fourteen thousand, twenty-five".