6643463415 has 16 divisors (see below), whose sum is σ = 10631246208. Its totient is φ = 3542612256.

The previous prime is 6643463399. The next prime is 6643463417. The reversal of 6643463415 is 5143643466.

It is not a de Polignac number, because 6643463415 - 2⁴ = 6643463399 is a prime.

It is a super-2 number, since 2×6643463415² = 88271212292886924450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6643463417) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71544 + ... + 135666.

It is an arithmetic number, because the mean of its divisors is an integer number (664452888).

Almost surely, 2^6643463415 is an apocalyptic number.

6643463415 is a deficient number, since it is larger than the sum of its proper divisors (3987782793).

6643463415 is a wasteful number, since it uses less digits than its factorization.

6643463415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71038.

The product of its digits is 622080, while the sum is 42.

The square root of 6643463415 is about 81507.4439238527. The cubic root of 6643463415 is about 1879.8860100457.

The spelling of 6643463415 in words is "six billion, six hundred forty-three million, four hundred sixty-three thousand, four hundred fifteen".