65663898 has 16 divisors (see below), whose sum is σ = 132135456. Its totient is φ = 21753360.

The previous prime is 65663893. The next prime is 65663903. The reversal of 65663898 is 89836656.

It is an interprime number because it is at equal distance from previous prime (65663893) and next prime (65663903).

It is a self number, because there is not a number n which added to its sum of digits gives 65663898.

It is not an unprimeable number, because it can be changed into a prime (65663891) 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, 32593 + ... + 34548.

It is an arithmetic number, because the mean of its divisors is an integer number (8258466).

Almost surely, 2^65663898 is an apocalyptic number.

65663898 is an abundant number, since it is smaller than the sum of its proper divisors (66471558).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65663898 is a wasteful number, since it uses less digits than its factorization.

65663898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67309.

The product of its digits is 1866240, while the sum is 51.

The square root of 65663898 is about 8103.3263540351. The cubic root of 65663898 is about 403.4368399211.

The spelling of 65663898 in words is "sixty-five million, six hundred sixty-three thousand, eight hundred ninety-eight".