6421674066 has 16 divisors (see below), whose sum is σ = 12935748000. Its totient is φ = 2125158048.

The previous prime is 6421674053. The next prime is 6421674067. The reversal of 6421674066 is 6604761246.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (6421674067) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3849091 + ... + 3850758.

It is an arithmetic number, because the mean of its divisors is an integer number (808484250).

Almost surely, 2^6421674066 is an apocalyptic number.

6421674066 is an abundant number, since it is smaller than the sum of its proper divisors (6514073934).

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

6421674066 is a wasteful number, since it uses less digits than its factorization.

6421674066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7699993.

The product of its (nonzero) digits is 290304, while the sum is 42.

The square root of 6421674066 is about 80135.3484175367. The cubic root of 6421674066 is about 1858.7290490797.

The spelling of 6421674066 in words is "six billion, four hundred twenty-one million, six hundred seventy-four thousand, sixty-six".