65998099 has 2 divisors, whose sum is σ = 65998100. Its totient is φ = 65998098.

The previous prime is 65998081. The next prime is 65998111. The reversal of 65998099 is 99089956.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65998099 - 2⁵ = 65998067 is a prime.

It is a super-2 number, since 2×65998099² = 8711498143227602, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (65998019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32999049 + 32999050.

It is an arithmetic number, because the mean of its divisors is an integer number (32999050).

Almost surely, 2^65998099 is an apocalyptic number.

65998099 is a deficient number, since it is larger than the sum of its proper divisors (1).

65998099 is an equidigital number, since it uses as much as digits as its factorization.

65998099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1574640, while the sum is 55.

The square root of 65998099 is about 8123.9214053313. The cubic root of 65998099 is about 404.1201220263.

The spelling of 65998099 in words is "sixty-five million, nine hundred ninety-eight thousand, ninety-nine".