65156965 has 4 divisors (see below), whose sum is σ = 78188364. Its totient is φ = 52125568.

The previous prime is 65156929. The next prime is 65156977. The reversal of 65156965 is 56965156.

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 37625956 + 27531009 = 6134^2 + 5247^2 .

It is a cyclic number.

It is not a de Polignac number, because 65156965 - 2⁷ = 65156837 is a prime.

It is a super-2 number, since 2×65156965² = 8490860176022450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6515692 + ... + 6515701.

It is an arithmetic number, because the mean of its divisors is an integer number (19547091).

Almost surely, 2^65156965 is an apocalyptic number.

It is an amenable number.

65156965 is a deficient number, since it is larger than the sum of its proper divisors (13031399).

65156965 is a wasteful number, since it uses less digits than its factorization.

65156965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13031398.

The product of its digits is 243000, while the sum is 43.

The square root of 65156965 is about 8071.9864345773. The cubic root of 65156965 is about 402.3959634924.

The spelling of 65156965 in words is "sixty-five million, one hundred fifty-six thousand, nine hundred sixty-five".