37660681 has 2 divisors, whose sum is σ = 37660682. Its totient is φ = 37660680.

The previous prime is 37660663. The next prime is 37660723. The reversal of 37660681 is 18606673.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22325625 + 15335056 = 4725^2 + 3916^2 .

It is a cyclic number.

It is not a de Polignac number, because 37660681 - 2¹¹ = 37658633 is a prime.

It is a super-2 number, since 2×37660681² = 2836653786767522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 37660681.

It is not a weakly prime, because it can be changed into another prime (37660621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18830340 + 18830341.

It is an arithmetic number, because the mean of its divisors is an integer number (18830341).

Almost surely, 2^37660681 is an apocalyptic number.

It is an amenable number.

37660681 is a deficient number, since it is larger than the sum of its proper divisors (1).

37660681 is an equidigital number, since it uses as much as digits as its factorization.

37660681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 37660681 is about 6136.8298819505. The cubic root of 37660681 is about 335.1938612093.

The spelling of 37660681 in words is "thirty-seven million, six hundred sixty thousand, six hundred eighty-one".