663413537 has 2 divisors, whose sum is σ = 663413538. Its totient is φ = 663413536.

The previous prime is 663413521. The next prime is 663413539. The reversal of 663413537 is 735314366.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 403849216 + 259564321 = 20096^2 + 16111^2 .

It is a cyclic number.

It is not a de Polignac number, because 663413537 - 2⁴ = 663413521 is a prime.

Together with 663413539, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_34454378 and since 663413537 and 34454378 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 663413537.

It is not a weakly prime, because it can be changed into another prime (663413539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331706768 + 331706769.

It is an arithmetic number, because the mean of its divisors is an integer number (331706769).

Almost surely, 2^663413537 is an apocalyptic number.

It is an amenable number.

663413537 is a deficient number, since it is larger than the sum of its proper divisors (1).

663413537 is an equidigital number, since it uses as much as digits as its factorization.

663413537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 38.

The square root of 663413537 is about 25756.8153505048. The cubic root of 663413537 is about 872.1572119438.

The spelling of 663413537 in words is "six hundred sixty-three million, four hundred thirteen thousand, five hundred thirty-seven".