6649669465 has 8 divisors (see below), whose sum is σ = 7995858048. Its totient is φ = 5308899120.

The previous prime is 6649669423. The next prime is 6649669471. The reversal of 6649669465 is 5649669466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6649669465 - 2³¹ = 4502185817 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1351857 + ... + 1356766.

It is an arithmetic number, because the mean of its divisors is an integer number (999482256).

Almost surely, 2^6649669465 is an apocalyptic number.

It is an amenable number.

6649669465 is a deficient number, since it is larger than the sum of its proper divisors (1346188583).

6649669465 is a wasteful number, since it uses less digits than its factorization.

6649669465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2709119.

The product of its digits is 50388480, while the sum is 61.

The square root of 6649669465 is about 81545.5054862008. The cubic root of 6649669465 is about 1880.4711985681.

Subtracting from 6649669465 its reverse (5649669466), we obtain a palindrome (999999999).

The spelling of 6649669465 in words is "six billion, six hundred forty-nine million, six hundred sixty-nine thousand, four hundred sixty-five".