664802228747 has 2 divisors, whose sum is σ = 664802228748. Its totient is φ = 664802228746.

The previous prime is 664802228627. The next prime is 664802228759. The reversal of 664802228747 is 747822208466.

664802228747 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 664802228747 - 2²⁸ = 664533793291 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 664802228692 and 664802228701.

It is not a weakly prime, because it can be changed into another prime (664802228777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332401114373 + 332401114374.

It is an arithmetic number, because the mean of its divisors is an integer number (332401114374).

Almost surely, 2^664802228747 is an apocalyptic number.

664802228747 is a deficient number, since it is larger than the sum of its proper divisors (1).

664802228747 is an equidigital number, since it uses as much as digits as its factorization.

664802228747 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14450688, while the sum is 56.

The spelling of 664802228747 in words is "six hundred sixty-four billion, eight hundred two million, two hundred twenty-eight thousand, seven hundred forty-seven".