66126611 has 2 divisors, whose sum is σ = 66126612. Its totient is φ = 66126610.

The previous prime is 66126607. The next prime is 66126637. The reversal of 66126611 is 11662166.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66126611 - 2² = 66126607 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66126211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33063305 + 33063306.

It is an arithmetic number, because the mean of its divisors is an integer number (33063306).

Almost surely, 2^66126611 is an apocalyptic number.

66126611 is a deficient number, since it is larger than the sum of its proper divisors (1).

66126611 is an equidigital number, since it uses as much as digits as its factorization.

66126611 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 29.

The square root of 66126611 is about 8131.8270394789. The cubic root of 66126611 is about 404.3822538826.

Adding to 66126611 its reverse (11662166), we get a palindrome (77788777).

It can be divided in two parts, 661 and 26611, that added together give a palindrome (27272).

The spelling of 66126611 in words is "sixty-six million, one hundred twenty-six thousand, six hundred eleven".