65198811 has 8 divisors (see below), whose sum is σ = 87034384. Its totient is φ = 43414560.

The previous prime is 65198807. The next prime is 65198849. The reversal of 65198811 is 11889156.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 65198811 - 2² = 65198807 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65198811.

It is not an unprimeable number, because it can be changed into a prime (65198801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9760 + ... + 15021.

It is an arithmetic number, because the mean of its divisors is an integer number (10879298).

Almost surely, 2^65198811 is an apocalyptic number.

65198811 is a deficient number, since it is larger than the sum of its proper divisors (21835573).

65198811 is a wasteful number, since it uses less digits than its factorization.

65198811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25661.

The product of its digits is 17280, while the sum is 39.

The square root of 65198811 is about 8074.5780694721. The cubic root of 65198811 is about 402.4820891429.

The spelling of 65198811 in words is "sixty-five million, one hundred ninety-eight thousand, eight hundred eleven".