663339577 has 4 divisors (see below), whose sum is σ = 663780096. Its totient is φ = 662899060.

The previous prime is 663339511. The next prime is 663339587. The reversal of 663339577 is 775933366.

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 663339577 - 2¹⁹ = 662815289 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 663339577.

It is not an unprimeable number, because it can be changed into a prime (663339587) 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, 217993 + ... + 221014.

It is an arithmetic number, because the mean of its divisors is an integer number (165945024).

Almost surely, 2^663339577 is an apocalyptic number.

It is an amenable number.

663339577 is a deficient number, since it is larger than the sum of its proper divisors (440519).

663339577 is a wasteful number, since it uses less digits than its factorization.

663339577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440518.

The product of its digits is 2143260, while the sum is 49.

The square root of 663339577 is about 25755.3795739842. The cubic root of 663339577 is about 872.1248002122.

It can be divided in two parts, 6633 and 39577, that multiplied together give a triangular number (262514241 = T₂₂₉₁₃).

The spelling of 663339577 in words is "six hundred sixty-three million, three hundred thirty-nine thousand, five hundred seventy-seven".