6421677261 has 8 divisors (see below), whose sum is σ = 8564154144. Its totient is φ = 4280159280.

The previous prime is 6421677221. The next prime is 6421677281. The reversal of 6421677261 is 1627761246.

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

It is not a de Polignac number, because 6421677261 - 2⁹ = 6421676749 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6421677221) 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 7 ways as a sum of consecutive naturals, for example, 223950 + ... + 250991.

It is an arithmetic number, because the mean of its divisors is an integer number (1070519268).

Almost surely, 2^6421677261 is an apocalyptic number.

It is an amenable number.

6421677261 is a deficient number, since it is larger than the sum of its proper divisors (2142476883).

6421677261 is a wasteful number, since it uses less digits than its factorization.

6421677261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479451.

The product of its digits is 169344, while the sum is 42.

The square root of 6421677261 is about 80135.3683525570. The cubic root of 6421677261 is about 1858.7293573398.

The spelling of 6421677261 in words is "six billion, four hundred twenty-one million, six hundred seventy-seven thousand, two hundred sixty-one".