65706761 has 2 divisors, whose sum is σ = 65706762. Its totient is φ = 65706760.

The previous prime is 65706757. The next prime is 65706787. The reversal of 65706761 is 16760756.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57760000 + 7946761 = 7600^2 + 2819^2 .

It is a cyclic number.

It is not a de Polignac number, because 65706761 - 2² = 65706757 is a prime.

It is a super-2 number, since 2×65706761² = 8634756882222242, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (65706461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32853380 + 32853381.

It is an arithmetic number, because the mean of its divisors is an integer number (32853381).

Almost surely, 2^65706761 is an apocalyptic number.

It is an amenable number.

65706761 is a deficient number, since it is larger than the sum of its proper divisors (1).

65706761 is an equidigital number, since it uses as much as digits as its factorization.

65706761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52920, while the sum is 38.

The square root of 65706761 is about 8105.9707006626. The cubic root of 65706761 is about 403.5246037838.

It can be divided in two parts, 6570 and 6761, that added together give a palindrome (13331).

The spelling of 65706761 in words is "sixty-five million, seven hundred six thousand, seven hundred sixty-one".