664583777057 has 4 divisors (see below), whose sum is σ = 665216112816. Its totient is φ = 663951441300.

The previous prime is 664583777041. The next prime is 664583777071. The reversal of 664583777057 is 750777385466.

664583777057 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 664583777057 - 2⁴ = 664583777041 is a prime.

It is a super-3 number, since 3×664583777057³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 664583776984 and 664583777002.

It is not an unprimeable number, because it can be changed into a prime (664583777087) 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, 316166303 + ... + 316168404.

It is an arithmetic number, because the mean of its divisors is an integer number (166304028204).

Almost surely, 2^664583777057 is an apocalyptic number.

It is an amenable number.

664583777057 is a deficient number, since it is larger than the sum of its proper divisors (632335759).

664583777057 is a wasteful number, since it uses less digits than its factorization.

664583777057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632335758.

The product of its (nonzero) digits is 207446400, while the sum is 65.

The spelling of 664583777057 in words is "six hundred sixty-four billion, five hundred eighty-three million, seven hundred seventy-seven thousand, fifty-seven".