37166681 has 2 divisors, whose sum is σ = 37166682. Its totient is φ = 37166680.

The previous prime is 37166669. The next prime is 37166683. The reversal of 37166681 is 18666173.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20430400 + 16736281 = 4520^2 + 4091^2 .

It is a cyclic number.

It is not a de Polignac number, because 37166681 - 2¹⁸ = 36904537 is a prime.

It is a super-2 number, since 2×37166681² = 2762724353111522, which contains 22 as substring.

Together with 37166683, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (37166683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18583340 + 18583341.

It is an arithmetic number, because the mean of its divisors is an integer number (18583341).

Almost surely, 2^37166681 is an apocalyptic number.

It is an amenable number.

37166681 is a deficient number, since it is larger than the sum of its proper divisors (1).

37166681 is an equidigital number, since it uses as much as digits as its factorization.

37166681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 38.

The square root of 37166681 is about 6096.4482282719. The cubic root of 37166681 is about 333.7218122986.

The spelling of 37166681 in words is "thirty-seven million, one hundred sixty-six thousand, six hundred eighty-one".