65667655099 has 2 divisors, whose sum is σ = 65667655100. Its totient is φ = 65667655098.

The previous prime is 65667655091. The next prime is 65667655111. The reversal of 65667655099 is 99055676656.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65667655099 - 2³ = 65667655091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65667655099.

It is not a weakly prime, because it can be changed into another prime (65667655091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32833827549 + 32833827550.

It is an arithmetic number, because the mean of its divisors is an integer number (32833827550).

Almost surely, 2^65667655099 is an apocalyptic number.

65667655099 is a deficient number, since it is larger than the sum of its proper divisors (1).

65667655099 is an equidigital number, since it uses as much as digits as its factorization.

65667655099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 91854000, while the sum is 64.

The spelling of 65667655099 in words is "sixty-five billion, six hundred sixty-seven million, six hundred fifty-five thousand, ninety-nine".