65116665091 has 2 divisors, whose sum is σ = 65116665092. Its totient is φ = 65116665090.

The previous prime is 65116665067. The next prime is 65116665121. The reversal of 65116665091 is 19056661156.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65116665091 is a prime.

It is not a weakly prime, because it can be changed into another prime (65116665491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32558332545 + 32558332546.

It is an arithmetic number, because the mean of its divisors is an integer number (32558332546).

Almost surely, 2^65116665091 is an apocalyptic number.

65116665091 is a deficient number, since it is larger than the sum of its proper divisors (1).

65116665091 is an equidigital number, since it uses as much as digits as its factorization.

65116665091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 291600, while the sum is 46.

The spelling of 65116665091 in words is "sixty-five billion, one hundred sixteen million, six hundred sixty-five thousand, ninety-one".