63667553 has 2 divisors, whose sum is σ = 63667554. Its totient is φ = 63667552.

The previous prime is 63667531. The next prime is 63667559. The reversal of 63667553 is 35576636.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36084049 + 27583504 = 6007^2 + 5252^2 .

It is a cyclic number.

It is not a de Polignac number, because 63667553 - 2⁸ = 63667297 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 63667553.

It is not a weakly prime, because it can be changed into another prime (63667559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31833776 + 31833777.

It is an arithmetic number, because the mean of its divisors is an integer number (31833777).

Almost surely, 2^63667553 is an apocalyptic number.

It is an amenable number.

63667553 is a deficient number, since it is larger than the sum of its proper divisors (1).

63667553 is an equidigital number, since it uses as much as digits as its factorization.

63667553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 340200, while the sum is 41.

The square root of 63667553 is about 7979.1950095232. The cubic root of 63667553 is about 399.3061993809.

The spelling of 63667553 in words is "sixty-three million, six hundred sixty-seven thousand, five hundred fifty-three".