664464462302777 has 4 divisors (see below), whose sum is σ = 687377029968420. Its totient is φ = 641551894637136.

The previous prime is 664464462302743. The next prime is 664464462302803. The reversal of 664464462302777 is 777203264464466.

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

It can be written as a sum of positive squares in 2 ways, for example, as 512178274398736 + 152286187904041 = 22631356^2 + 12340429^2 .

It is a cyclic number.

It is not a de Polignac number, because 664464462302777 - 2⁸ = 664464462302521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664464462302477) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11456283832778 + ... + 11456283832835.

It is an arithmetic number, because the mean of its divisors is an integer number (171844257492105).

Almost surely, 2^{664464462302777} is an apocalyptic number.

It is an amenable number.

664464462302777 is a deficient number, since it is larger than the sum of its proper divisors (22912567665643).

664464462302777 is a wasteful number, since it uses less digits than its factorization.

664464462302777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22912567665642.

The product of its (nonzero) digits is 1365590016, while the sum is 68.

The spelling of 664464462302777 in words is "six hundred sixty-four trillion, four hundred sixty-four billion, four hundred sixty-two million, three hundred two thousand, seven hundred seventy-seven".