65707565 has 16 divisors (see below), whose sum is σ = 98305920. Its totient is φ = 40960320.

The previous prime is 65707561. The next prime is 65707583. The reversal of 65707565 is 56570756.

It is not a de Polignac number, because 65707565 - 2² = 65707561 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65707561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84950 + ... + 85719.

It is an arithmetic number, because the mean of its divisors is an integer number (6144120).

Almost surely, 2^65707565 is an apocalyptic number.

It is an amenable number.

65707565 is a deficient number, since it is larger than the sum of its proper divisors (32598355).

65707565 is a wasteful number, since it uses less digits than its factorization.

65707565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170692.

The product of its (nonzero) digits is 220500, while the sum is 41.

The square root of 65707565 is about 8106.0202935843. The cubic root of 65707565 is about 403.5262496442.

The spelling of 65707565 in words is "sixty-five million, seven hundred seven thousand, five hundred sixty-five".