6461669279 has 4 divisors (see below), whose sum is σ = 6958720776. Its totient is φ = 5964617784.

The previous prime is 6461669273. The next prime is 6461669287. The reversal of 6461669279 is 9729661646.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 6461669279 - 2²⁰ = 6460620703 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6461669273) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 248525729 + ... + 248525754.

It is an arithmetic number, because the mean of its divisors is an integer number (1739680194).

Almost surely, 2^6461669279 is an apocalyptic number.

6461669279 is a deficient number, since it is larger than the sum of its proper divisors (497051497).

6461669279 is a wasteful number, since it uses less digits than its factorization.

6461669279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497051496.

The product of its digits is 5878656, while the sum is 56.

The square root of 6461669279 is about 80384.5089491750. The cubic root of 6461669279 is about 1862.5798861520.

The spelling of 6461669279 in words is "six billion, four hundred sixty-one million, six hundred sixty-nine thousand, two hundred seventy-nine".