6421674081 has 16 divisors (see below), whose sum is σ = 8617318400. Its totient is φ = 4253634000.

The previous prime is 6421674079. The next prime is 6421674097. The reversal of 6421674081 is 1804761246.

It is not a de Polignac number, because 6421674081 - 2¹ = 6421674079 is a prime.

It is a super-2 number, since 2×6421674081² = 82475796005174389122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6421674011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 441186 + ... + 455508.

It is an arithmetic number, because the mean of its divisors is an integer number (538582400).

Almost surely, 2^6421674081 is an apocalyptic number.

It is an amenable number.

6421674081 is a deficient number, since it is larger than the sum of its proper divisors (2195644319).

6421674081 is a wasteful number, since it uses less digits than its factorization.

6421674081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15276.

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 6421674081 is about 80135.3485111283. The cubic root of 6421674081 is about 1858.7290505269.

The spelling of 6421674081 in words is "six billion, four hundred twenty-one million, six hundred seventy-four thousand, eighty-one".