65998825 has 6 divisors (see below), whose sum is σ = 81838574. Its totient is φ = 52799040.

The previous prime is 65998817. The next prime is 65998841. The reversal of 65998825 is 52889956.

It can be written as a sum of positive squares in 3 ways, for example, as 15147664 + 50851161 = 3892^2 + 7131^2 .

It is not a de Polignac number, because 65998825 - 2³ = 65998817 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1319952 + ... + 1320001.

Almost surely, 2^65998825 is an apocalyptic number.

It is an amenable number.

65998825 is a deficient number, since it is larger than the sum of its proper divisors (15839749).

65998825 is a wasteful number, since it uses less digits than its factorization.

65998825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2639963 (or 2639958 counting only the distinct ones).

The product of its digits is 1555200, while the sum is 52.

The square root of 65998825 is about 8123.9660880631. The cubic root of 65998825 is about 404.1216038374.

The spelling of 65998825 in words is "sixty-five million, nine hundred ninety-eight thousand, eight hundred twenty-five".