65405563 has 2 divisors, whose sum is σ = 65405564. Its totient is φ = 65405562.

The previous prime is 65405539. The next prime is 65405573. The reversal of 65405563 is 36550456.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65405563 - 2⁵ = 65405531 is a prime.

It is not a weakly prime, because it can be changed into another prime (65405513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32702781 + 32702782.

It is an arithmetic number, because the mean of its divisors is an integer number (32702782).

Almost surely, 2^65405563 is an apocalyptic number.

65405563 is a deficient number, since it is larger than the sum of its proper divisors (1).

65405563 is an equidigital number, since it uses as much as digits as its factorization.

65405563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54000, while the sum is 34.

The square root of 65405563 is about 8087.3705862907. The cubic root of 65405563 is about 402.9070773203.

The spelling of 65405563 in words is "sixty-five million, four hundred five thousand, five hundred sixty-three".