36666631 has 2 divisors, whose sum is σ = 36666632. Its totient is φ = 36666630.

The previous prime is 36666607. The next prime is 36666647. The reversal of 36666631 is 13666663.

It is a strong prime.

It is an emirp because it is prime and its reverse (13666663) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 36666631 - 2¹¹ = 36664583 is a prime.

It is a super-2 number, since 2×36666631² = 2688883657780322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36666691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18333315 + 18333316.

It is an arithmetic number, because the mean of its divisors is an integer number (18333316).

Almost surely, 2^36666631 is an apocalyptic number.

36666631 is a deficient number, since it is larger than the sum of its proper divisors (1).

36666631 is an equidigital number, since it uses as much as digits as its factorization.

36666631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 37.

The square root of 36666631 is about 6055.2977631162. The cubic root of 36666631 is about 332.2183900848.

The spelling of 36666631 in words is "thirty-six million, six hundred sixty-six thousand, six hundred thirty-one".