6465378966 has 8 divisors (see below), whose sum is σ = 12930757944. Its totient is φ = 2155126320.

The previous prime is 6465378949. The next prime is 6465378967. The reversal of 6465378966 is 6698735646.

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

6465378966 is an admirable number.

It is a super-2 number, since 2×6465378966² = 83602250347990458312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6465378967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 538781575 + ... + 538781586.

It is an arithmetic number, because the mean of its divisors is an integer number (1616344743).

Almost surely, 2^6465378966 is an apocalyptic number.

6465378966 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6465378966 is a wasteful number, since it uses less digits than its factorization.

6465378966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1077563166.

The product of its digits is 39191040, while the sum is 60.

The square root of 6465378966 is about 80407.5802769863. The cubic root of 6465378966 is about 1862.9362577661.

The spelling of 6465378966 in words is "six billion, four hundred sixty-five million, three hundred seventy-eight thousand, nine hundred sixty-six".