65855971 has 2 divisors, whose sum is σ = 65855972. Its totient is φ = 65855970.

The previous prime is 65855921. The next prime is 65855983. The reversal of 65855971 is 17955856.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65855971 - 2⁹ = 65855459 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (65855921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32927985 + 32927986.

It is an arithmetic number, because the mean of its divisors is an integer number (32927986).

Almost surely, 2^65855971 is an apocalyptic number.

65855971 is a deficient number, since it is larger than the sum of its proper divisors (1).

65855971 is an equidigital number, since it uses as much as digits as its factorization.

65855971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 378000, while the sum is 46.

The square root of 65855971 is about 8115.1691910890. The cubic root of 65855971 is about 403.8298204099.

The spelling of 65855971 in words is "sixty-five million, eight hundred fifty-five thousand, nine hundred seventy-one".