6621323747 has 2 divisors, whose sum is σ = 6621323748. Its totient is φ = 6621323746.

The previous prime is 6621323713. The next prime is 6621323783. The reversal of 6621323747 is 7473231266.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6621323747 - 2¹² = 6621319651 is a prime.

It is a super-2 number, since 2×6621323747² = 87683856325172240018, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6621323147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3310661873 + 3310661874.

It is an arithmetic number, because the mean of its divisors is an integer number (3310661874).

Almost surely, 2^6621323747 is an apocalyptic number.

6621323747 is a deficient number, since it is larger than the sum of its proper divisors (1).

6621323747 is an equidigital number, since it uses as much as digits as its factorization.

6621323747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 41.

The square root of 6621323747 is about 81371.5168041004. The cubic root of 6621323747 is about 1877.7954151784.

The spelling of 6621323747 in words is "six billion, six hundred twenty-one million, three hundred twenty-three thousand, seven hundred forty-seven".