6721614265 has 4 divisors (see below), whose sum is σ = 8065937124. Its totient is φ = 5377291408.

The previous prime is 6721614257. The next prime is 6721614313. The reversal of 6721614265 is 5624161276.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 845471929 + 5876142336 = 29077^2 + 76656^2 .

It is a cyclic number.

It is not a de Polignac number, because 6721614265 - 2³ = 6721614257 is a prime.

It is a super-3 number, since 3×6721614265³ (a number of 30 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 672161422 + ... + 672161431.

It is an arithmetic number, because the mean of its divisors is an integer number (2016484281).

Almost surely, 2^6721614265 is an apocalyptic number.

It is an amenable number.

6721614265 is a deficient number, since it is larger than the sum of its proper divisors (1344322859).

6721614265 is a wasteful number, since it uses less digits than its factorization.

6721614265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1344322858.

The product of its digits is 120960, while the sum is 40.

The square root of 6721614265 is about 81985.4515447710. The cubic root of 6721614265 is about 1887.2286833677.

The spelling of 6721614265 in words is "six billion, seven hundred twenty-one million, six hundred fourteen thousand, two hundred sixty-five".