65575399 has 2 divisors, whose sum is σ = 65575400. Its totient is φ = 65575398.

The previous prime is 65575337. The next prime is 65575421. The reversal of 65575399 is 99357556.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65575399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65578399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32787699 + 32787700.

It is an arithmetic number, because the mean of its divisors is an integer number (32787700).

Almost surely, 2^65575399 is an apocalyptic number.

65575399 is a deficient number, since it is larger than the sum of its proper divisors (1).

65575399 is an equidigital number, since it uses as much as digits as its factorization.

65575399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1275750, while the sum is 49.

The square root of 65575399 is about 8097.8638541284. The cubic root of 65575399 is about 403.2555134489.

The spelling of 65575399 in words is "sixty-five million, five hundred seventy-five thousand, three hundred ninety-nine".