65871761 has 2 divisors, whose sum is σ = 65871762. Its totient is φ = 65871760.

The previous prime is 65871737. The next prime is 65871791. The reversal of 65871761 is 16717856.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38987536 + 26884225 = 6244^2 + 5185^2 .

It is a cyclic number.

It is not a de Polignac number, because 65871761 - 2⁶ = 65871697 is a prime.

It is a super-2 number, since 2×65871761² = 8678177794482242, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (65871791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32935880 + 32935881.

It is an arithmetic number, because the mean of its divisors is an integer number (32935881).

Almost surely, 2^65871761 is an apocalyptic number.

It is an amenable number.

65871761 is a deficient number, since it is larger than the sum of its proper divisors (1).

65871761 is an equidigital number, since it uses as much as digits as its factorization.

65871761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70560, while the sum is 41.

The square root of 65871761 is about 8116.1420022077. The cubic root of 65871761 is about 403.8620926712.

The spelling of 65871761 in words is "sixty-five million, eight hundred seventy-one thousand, seven hundred sixty-one".