2666537 has 2 divisors, whose sum is σ = 2666538. Its totient is φ = 2666536.

The previous prime is 2666519. The next prime is 2666539. The reversal of 2666537 is 7356662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1628176 + 1038361 = 1276^2 + 1019^2 .

It is a cyclic number.

It is not a de Polignac number, because 2666537 - 2⁸ = 2666281 is a prime.

It is a super-2 number, since 2×2666537² = 14220839144738, which contains 22 as substring.

Together with 2666539, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 2666497 and 2666506.

It is not a weakly prime, because it can be changed into another prime (2666539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1333268 + 1333269.

It is an arithmetic number, because the mean of its divisors is an integer number (1333269).

2^2666537 is an apocalyptic number.

It is an amenable number.

2666537 is a deficient number, since it is larger than the sum of its proper divisors (1).

2666537 is an equidigital number, since it uses as much as digits as its factorization.

2666537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 35.

The square root of 2666537 is about 1632.9534592266. The cubic root of 2666537 is about 138.6700071876.

The spelling of 2666537 in words is "two million, six hundred sixty-six thousand, five hundred thirty-seven".