6621433848394 has 4 divisors (see below), whose sum is σ = 9932150772594. Its totient is φ = 3310716924196.

The previous prime is 6621433848373. The next prime is 6621433848433. The reversal of 6621433848394 is 4938483341266.

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

It can be written as a sum of positive squares in only one way, i.e., 5329149165025 + 1292284683369 = 2308495^2 + 1136787^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1655358462097 + ... + 1655358462100.

Almost surely, 2^{6621433848394} is an apocalyptic number.

6621433848394 is a deficient number, since it is larger than the sum of its proper divisors (3310716924200).

6621433848394 is a wasteful number, since it uses less digits than its factorization.

6621433848394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3310716924199.

The product of its digits is 71663616, while the sum is 61.

The spelling of 6621433848394 in words is "six trillion, six hundred twenty-one billion, four hundred thirty-three million, eight hundred forty-eight thousand, three hundred ninety-four".