65707069 has 4 divisors (see below), whose sum is σ = 67972860. Its totient is φ = 63441280.

The previous prime is 65707049. The next prime is 65707123. The reversal of 65707069 is 96070756.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 40576900 + 25130169 = 6370^2 + 5013^2 .

It is a cyclic number.

It is not a de Polignac number, because 65707069 - 2⁷ = 65706941 is a prime.

It is a super-2 number, since 2×65707069² = 8634837833141522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65707039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1132852 + ... + 1132909.

It is an arithmetic number, because the mean of its divisors is an integer number (16993215).

Almost surely, 2^65707069 is an apocalyptic number.

It is an amenable number.

65707069 is a deficient number, since it is larger than the sum of its proper divisors (2265791).

65707069 is a wasteful number, since it uses less digits than its factorization.

65707069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2265790.

The product of its (nonzero) digits is 79380, while the sum is 40.

The square root of 65707069 is about 8105.9896989819. The cubic root of 65707069 is about 403.5252342891.

It can be divided in two parts, 6 and 5707069, that added together give a palindrome (5707075).

The spelling of 65707069 in words is "sixty-five million, seven hundred seven thousand, sixty-nine".