65108761 has 3 divisors (see below), whose sum is σ = 65116831. Its totient is φ = 65100692.

The previous prime is 65108749. The next prime is 65108767. The reversal of 65108761 is 16780156.

The square root of 65108761 is 8069.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 145161 + 64963600 = 381^2 + 8060^2 .

It is not a de Polignac number, because 65108761 - 2¹⁹ = 64584473 is a prime.

It is a super-3 number, since 3×65108761³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65108767) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4035 + ... + 12103.

Almost surely, 2^65108761 is an apocalyptic number.

65108761 is the 8069-th square number.

65108761 is the 4035-th centered octagonal number.

It is an amenable number.

65108761 is a deficient number, since it is larger than the sum of its proper divisors (8070).

65108761 is an frugal number, since it uses more digits than its factorization.

65108761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16138 (or 8069 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 34.

The cubic root of 65108761 is about 402.2967063606.

The spelling of 65108761 in words is "sixty-five million, one hundred eight thousand, seven hundred sixty-one".