91666850927 has 2 divisors, whose sum is σ = 91666850928. Its totient is φ = 91666850926.

The previous prime is 91666850903. The next prime is 91666850939. The reversal of 91666850927 is 72905866619.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91666850927 - 2¹⁴ = 91666834543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91666855927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45833425463 + 45833425464.

It is an arithmetic number, because the mean of its divisors is an integer number (45833425464).

Almost surely, 2^91666850927 is an apocalyptic number.

91666850927 is a deficient number, since it is larger than the sum of its proper divisors (1).

91666850927 is an equidigital number, since it uses as much as digits as its factorization.

91666850927 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9797760, while the sum is 59.

The spelling of 91666850927 in words is "ninety-one billion, six hundred sixty-six million, eight hundred fifty thousand, nine hundred twenty-seven".