65861611 has 2 divisors, whose sum is σ = 65861612. Its totient is φ = 65861610.

The previous prime is 65861597. The next prime is 65861629. The reversal of 65861611 is 11616856.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65861611 - 2¹³ = 65853419 is a prime.

It is not a weakly prime, because it can be changed into another prime (65862611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32930805 + 32930806.

It is an arithmetic number, because the mean of its divisors is an integer number (32930806).

Almost surely, 2^65861611 is an apocalyptic number.

65861611 is a deficient number, since it is larger than the sum of its proper divisors (1).

65861611 is an equidigital number, since it uses as much as digits as its factorization.

65861611 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 34.

The square root of 65861611 is about 8115.5166810253. The cubic root of 65861611 is about 403.8413482696.

The spelling of 65861611 in words is "sixty-five million, eight hundred sixty-one thousand, six hundred eleven".