66037091 has 2 divisors, whose sum is σ = 66037092. Its totient is φ = 66037090.

The previous prime is 66037063. The next prime is 66037109. The reversal of 66037091 is 19073066.

Together with next prime (66037109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66037091 is a prime.

It is not a weakly prime, because it can be changed into another prime (66037051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33018545 + 33018546.

It is an arithmetic number, because the mean of its divisors is an integer number (33018546).

Almost surely, 2^66037091 is an apocalyptic number.

66037091 is a deficient number, since it is larger than the sum of its proper divisors (1).

66037091 is an equidigital number, since it uses as much as digits as its factorization.

66037091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 66037091 is about 8126.3208772482. The cubic root of 66037091 is about 404.1996917405.

The spelling of 66037091 in words is "sixty-six million, thirty-seven thousand, ninety-one".