65695561 has 2 divisors, whose sum is σ = 65695562. Its totient is φ = 65695560.

The previous prime is 65695543. The next prime is 65695573. The reversal of 65695561 is 16559656.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45981961 + 19713600 = 6781^2 + 4440^2 .

It is a cyclic number.

It is not a de Polignac number, because 65695561 - 2¹⁷ = 65564489 is a prime.

It is not a weakly prime, because it can be changed into another prime (65690561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32847780 + 32847781.

It is an arithmetic number, because the mean of its divisors is an integer number (32847781).

Almost surely, 2^65695561 is an apocalyptic number.

It is an amenable number.

65695561 is a deficient number, since it is larger than the sum of its proper divisors (1).

65695561 is an equidigital number, since it uses as much as digits as its factorization.

65695561 is an evil number, because the sum of its binary digits is even.

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

The square root of 65695561 is about 8105.2798224367. The cubic root of 65695561 is about 403.5016749796.

The spelling of 65695561 in words is "sixty-five million, six hundred ninety-five thousand, five hundred sixty-one".