65066591 has 2 divisors, whose sum is σ = 65066592. Its totient is φ = 65066590.

The previous prime is 65066587. The next prime is 65066597. The reversal of 65066591 is 19566056.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65066591 - 2² = 65066587 is a prime.

It is a super-2 number, since 2×65066591² = 8467322528722562, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65066597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32533295 + 32533296.

It is an arithmetic number, because the mean of its divisors is an integer number (32533296).

Almost surely, 2^65066591 is an apocalyptic number.

65066591 is a deficient number, since it is larger than the sum of its proper divisors (1).

65066591 is an equidigital number, since it uses as much as digits as its factorization.

65066591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48600, while the sum is 38.

The square root of 65066591 is about 8066.3864896247. The cubic root of 65066591 is about 402.2098336889.

The spelling of 65066591 in words is "sixty-five million, sixty-six thousand, five hundred ninety-one".