6638050663 has 4 divisors (see below), whose sum is σ = 6657180840. Its totient is φ = 6618920488.

The previous prime is 6638050651. The next prime is 6638050681. The reversal of 6638050663 is 3660508366.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3660508366 = 2 ⋅1830254183.

It is a cyclic number.

It is not a de Polignac number, because 6638050663 - 2²⁹ = 6101179751 is a prime.

It is a super-4 number, since 4×6638050663⁴ (a number of 40 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6638050763) 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, 9564568 + ... + 9565261.

It is an arithmetic number, because the mean of its divisors is an integer number (1664295210).

Almost surely, 2^6638050663 is an apocalyptic number.

6638050663 is a deficient number, since it is larger than the sum of its proper divisors (19130177).

6638050663 is a wasteful number, since it uses less digits than its factorization.

6638050663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19130176.

The product of its (nonzero) digits is 466560, while the sum is 43.

The square root of 6638050663 is about 81474.2331231169. The cubic root of 6638050663 is about 1879.3753265448.

The spelling of 6638050663 in words is "six billion, six hundred thirty-eight million, fifty thousand, six hundred sixty-three".