65857109 has 8 divisors (see below), whose sum is σ = 66810528. Its totient is φ = 64910160.

The previous prime is 65857093. The next prime is 65857117. The reversal of 65857109 is 90175856.

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

It is a cyclic number.

It is not a de Polignac number, because 65857109 - 2⁴ = 65857093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65857189) 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, 21119 + ... + 24035.

It is an arithmetic number, because the mean of its divisors is an integer number (8351316).

Almost surely, 2^65857109 is an apocalyptic number.

It is an amenable number.

65857109 is a deficient number, since it is larger than the sum of its proper divisors (953419).

65857109 is a wasteful number, since it uses less digits than its factorization.

65857109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3235.

The product of its (nonzero) digits is 75600, while the sum is 41.

The square root of 65857109 is about 8115.2393063914. The cubic root of 65857109 is about 403.8321464743.

The spelling of 65857109 in words is "sixty-five million, eight hundred fifty-seven thousand, one hundred nine".