36666491 has 2 divisors, whose sum is σ = 36666492. Its totient is φ = 36666490.

The previous prime is 36666473. The next prime is 36666499. The reversal of 36666491 is 19466663.

It is a strong prime.

It is an emirp because it is prime and its reverse (19466663) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-36666491 is a prime.

It is a super-3 number, since 3×36666491³ (a number of 24 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (36666499) 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, 18333245 + 18333246.

It is an arithmetic number, because the mean of its divisors is an integer number (18333246).

Almost surely, 2^36666491 is an apocalyptic number.

36666491 is a deficient number, since it is larger than the sum of its proper divisors (1).

36666491 is an equidigital number, since it uses as much as digits as its factorization.

36666491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 139968, while the sum is 41.

The square root of 36666491 is about 6055.2862029800. The cubic root of 36666491 is about 332.2179672605.

The spelling of 36666491 in words is "thirty-six million, six hundred sixty-six thousand, four hundred ninety-one".