65995959 has 8 divisors (see below), whose sum is σ = 88042240. Its totient is φ = 43973496.

The previous prime is 65995939. The next prime is 65995981. The reversal of 65995959 is 95959956.

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

It is not a de Polignac number, because 65995959 - 2⁸ = 65995703 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65995899 and 65995908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65995939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2052 + ... + 11670.

It is an arithmetic number, because the mean of its divisors is an integer number (11005280).

Almost surely, 2^65995959 is an apocalyptic number.

65995959 is a deficient number, since it is larger than the sum of its proper divisors (22046281).

65995959 is a wasteful number, since it uses less digits than its factorization.

65995959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11909.

The product of its digits is 4920750, while the sum is 57.

The square root of 65995959 is about 8123.7896944714. The cubic root of 65995959 is about 404.1157540904.

The spelling of 65995959 in words is "sixty-five million, nine hundred ninety-five thousand, nine hundred fifty-nine".