6350644665 has 48 divisors (see below), whose sum is σ = 11353305600. Its totient is φ = 3281475456.

The previous prime is 6350644639. The next prime is 6350644667. The reversal of 6350644665 is 5664460536.

6350644665 is a `hidden beast` number, since 635 + 0 + 6 + 4 + 4 + 6 + 6 + 5 = 666.

It is not a de Polignac number, because 6350644665 - 2¹⁶ = 6350579129 is a prime.

It is a super-4 number, since 4×6350644665⁴ (a number of 40 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6350644665.

It is not an unprimeable number, because it can be changed into a prime (6350644667) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 389956 + ... + 405914.

It is an arithmetic number, because the mean of its divisors is an integer number (236527200).

Almost surely, 2^6350644665 is an apocalyptic number.

It is an amenable number.

6350644665 is a deficient number, since it is larger than the sum of its proper divisors (5002660935).

6350644665 is a wasteful number, since it uses less digits than its factorization.

6350644665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16246 (or 16243 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 45.

The square root of 6350644665 is about 79690.9321378537. The cubic root of 6350644665 is about 1851.8505626717.

The spelling of 6350644665 in words is "six billion, three hundred fifty million, six hundred forty-four thousand, six hundred sixty-five".