65709057 has 16 divisors (see below), whose sum is σ = 90685440. Its totient is φ = 42277200.

The previous prime is 65709047. The next prime is 65709071. The reversal of 65709057 is 75090756.

It is not a de Polignac number, because 65709057 - 2⁸ = 65708801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65709037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44944 + ... + 46382.

It is an arithmetic number, because the mean of its divisors is an integer number (5667840).

Almost surely, 2^65709057 is an apocalyptic number.

It is an amenable number.

65709057 is a deficient number, since it is larger than the sum of its proper divisors (24976383).

65709057 is a wasteful number, since it uses less digits than its factorization.

65709057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1964.

The product of its (nonzero) digits is 66150, while the sum is 39.

The square root of 65709057 is about 8106.1123234261. The cubic root of 65709057 is about 403.5293038669.

The spelling of 65709057 in words is "sixty-five million, seven hundred nine thousand, fifty-seven".