663406575 has 24 divisors (see below), whose sum is σ = 1181205648. Its totient is φ = 326599680.

The previous prime is 663406573. The next prime is 663406613. The reversal of 663406575 is 575604366.

It is not a de Polignac number, because 663406575 - 2¹ = 663406573 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663406573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 339234 + ... + 341183.

It is an arithmetic number, because the mean of its divisors is an integer number (49216902).

Almost surely, 2^663406575 is an apocalyptic number.

663406575 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

663406575 is a deficient number, since it is larger than the sum of its proper divisors (517799073).

663406575 is a wasteful number, since it uses less digits than its factorization.

663406575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680443 (or 680438 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 42.

The square root of 663406575 is about 25756.6802014545. The cubic root of 663406575 is about 872.1541610666.

The spelling of 663406575 in words is "six hundred sixty-three million, four hundred six thousand, five hundred seventy-five".