1663418963 has 4 divisors (see below), whose sum is σ = 1666224648. Its totient is φ = 1660613280.

The previous prime is 1663418959. The next prime is 1663418993. The reversal of 1663418963 is 3698143661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3698143661 = 2477 ⋅1492993.

It is a cyclic number.

It is not a de Polignac number, because 1663418963 - 2² = 1663418959 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1663418993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1401953 + ... + 1403138.

It is an arithmetic number, because the mean of its divisors is an integer number (416556162).

Almost surely, 2^1663418963 is an apocalyptic number.

1663418963 is a deficient number, since it is larger than the sum of its proper divisors (2805685).

1663418963 is an equidigital number, since it uses as much as digits as its factorization.

1663418963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2805684.

The product of its digits is 559872, while the sum is 47.

The square root of 1663418963 is about 40785.0335662483. The cubic root of 1663418963 is about 1184.8604850378.

The spelling of 1663418963 in words is "one billion, six hundred sixty-three million, four hundred eighteen thousand, nine hundred sixty-three".