66160091 has 2 divisors, whose sum is σ = 66160092. Its totient is φ = 66160090.

The previous prime is 66160079. The next prime is 66160099. The reversal of 66160091 is 19006166.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66160091 - 2⁶ = 66160027 is a prime.

It is a super-2 number, since 2×66160091² = 8754315282256562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66160099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33080045 + 33080046.

It is an arithmetic number, because the mean of its divisors is an integer number (33080046).

Almost surely, 2^66160091 is an apocalyptic number.

66160091 is a deficient number, since it is larger than the sum of its proper divisors (1).

66160091 is an equidigital number, since it uses as much as digits as its factorization.

66160091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 66160091 is about 8133.8853569497. The cubic root of 66160091 is about 404.4504888105.

The spelling of 66160091 in words is "sixty-six million, one hundred sixty thousand, ninety-one".