663499537 has 2 divisors, whose sum is σ = 663499538. Its totient is φ = 663499536.

The previous prime is 663499531. The next prime is 663499547. The reversal of 663499537 is 735994366.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 655411201 + 8088336 = 25601^2 + 2844^2 .

It is a cyclic number.

It is not a de Polignac number, because 663499537 - 2¹¹ = 663497489 is a prime.

It is not a weakly prime, because it can be changed into another prime (663499531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331749768 + 331749769.

It is an arithmetic number, because the mean of its divisors is an integer number (331749769).

Almost surely, 2^663499537 is an apocalyptic number.

It is an amenable number.

663499537 is a deficient number, since it is larger than the sum of its proper divisors (1).

663499537 is an equidigital number, since it uses as much as digits as its factorization.

663499537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3674160, while the sum is 52.

The square root of 663499537 is about 25758.4847574542. The cubic root of 663499537 is about 872.1948969750.

The spelling of 663499537 in words is "six hundred sixty-three million, four hundred ninety-nine thousand, five hundred thirty-seven".