6644222487 has 24 divisors (see below), whose sum is σ = 11235762720. Its totient is φ = 3704094720.

The previous prime is 6644222479. The next prime is 6644222491. The reversal of 6644222487 is 7842224466.

It is not a de Polignac number, because 6644222487 - 2³ = 6644222479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6644222407) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1283562 + ... + 1288727.

It is an arithmetic number, because the mean of its divisors is an integer number (468156780).

Almost surely, 2^6644222487 is an apocalyptic number.

6644222487 is a deficient number, since it is larger than the sum of its proper divisors (4591540233).

6644222487 is a wasteful number, since it uses less digits than its factorization.

6644222487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2572343 (or 2572340 counting only the distinct ones).

The product of its digits is 1032192, while the sum is 45.

The square root of 6644222487 is about 81512.1002489814. The cubic root of 6644222487 is about 1879.9576049554.

The spelling of 6644222487 in words is "six billion, six hundred forty-four million, two hundred twenty-two thousand, four hundred eighty-seven".