6405029665 has 16 divisors (see below), whose sum is σ = 7743799296. Its totient is φ = 5085576000.

The previous prime is 6405029663. The next prime is 6405029711. The reversal of 6405029665 is 5669205046.

It is not a de Polignac number, because 6405029665 - 2¹ = 6405029663 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6405029663) 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, 1039584 + ... + 1045726.

It is an arithmetic number, because the mean of its divisors is an integer number (483987456).

Almost surely, 2^6405029665 is an apocalyptic number.

It is an amenable number.

6405029665 is a deficient number, since it is larger than the sum of its proper divisors (1338769631).

6405029665 is a wasteful number, since it uses less digits than its factorization.

6405029665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7680.

The product of its (nonzero) digits is 388800, while the sum is 43.

The square root of 6405029665 is about 80031.4292325209. The cubic root of 6405029665 is about 1857.1217735265.

It can be divided in two parts, 640 and 5029665, that added together give a palindrome (5030305).

The spelling of 6405029665 in words is "six billion, four hundred five million, twenty-nine thousand, six hundred sixty-five".