65518091 has 2 divisors, whose sum is σ = 65518092. Its totient is φ = 65518090.

The previous prime is 65518043. The next prime is 65518093. The reversal of 65518091 is 19081556.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65518091 - 2¹⁴ = 65501707 is a prime.

It is a Sophie Germain prime.

Together with 65518093, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (65518093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32759045 + 32759046.

It is an arithmetic number, because the mean of its divisors is an integer number (32759046).

Almost surely, 2^65518091 is an apocalyptic number.

65518091 is a deficient number, since it is larger than the sum of its proper divisors (1).

65518091 is an equidigital number, since it uses as much as digits as its factorization.

65518091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 35.

The square root of 65518091 is about 8094.3246166682. The cubic root of 65518091 is about 403.1380074805.

The spelling of 65518091 in words is "sixty-five million, five hundred eighteen thousand, ninety-one".